Nitrogen Fixation: The process in certain BACTERIA; FUNGI; and CYANOBACTERIA converting free atmospheric NITROGEN to biologically usable forms of nitrogen, such as AMMONIA; NITRATES; and amino compounds.Nitrogenase: An enzyme system that catalyzes the fixing of nitrogen in soil bacteria and blue-green algae (CYANOBACTERIA). EC 220.127.116.11.Gluconacetobacter: A genus in the family ACETOBACTERACEAE comprised of acetate-oxidizing bacteria.Nitrogen Cycle: The circulation of nitrogen in nature, consisting of a cycle of biochemical reactions in which atmospheric nitrogen is compounded, dissolved in rain, and deposited in the soil, where it is assimilated and metabolized by bacteria and plants, eventually returning to the atmosphere by bacterial decomposition of organic matter.Azotobacter vinelandii: A species of gram-negative, aerobic bacteria first isolated from soil in Vineland, New Jersey. Ammonium and nitrate are used as nitrogen sources by this bacterium. It is distinguished from other members of its genus by the ability to use rhamnose as a carbon source. (From Bergey's Manual of Determinative Bacteriology, 9th ed)Molybdoferredoxin: A non-heme iron-sulfur protein isolated from Clostridium pasteurianum and other bacteria. It is a component of NITROGENASE, which is active in nitrogen fixation, and consists of two subunits with molecular weights of 59.5 kDa and 50.7 kDa, respectively.Nitrogen: An element with the atomic symbol N, atomic number 7, and atomic weight [14.00643; 14.00728]. Nitrogen exists as a diatomic gas and makes up about 78% of the earth's atmosphere by volume. It is a constituent of proteins and nucleic acids and found in all living cells.Symbiosis: The relationship between two different species of organisms that are interdependent; each gains benefits from the other or a relationship between different species where both of the organisms in question benefit from the presence of the other.Nitrogen Compounds: Inorganic compounds that contain nitrogen as an integral part of the molecule.Nitrogen Isotopes: Stable nitrogen atoms that have the same atomic number as the element nitrogen, but differ in atomic weight. N-15 is a stable nitrogen isotope.Blood Urea Nitrogen: The urea concentration of the blood stated in terms of nitrogen content. Serum (plasma) urea nitrogen is approximately 12% higher than blood urea nitrogen concentration because of the greater protein content of red blood cells. Increases in blood or serum urea nitrogen are referred to as azotemia and may have prerenal, renal, or postrenal causes. (From Saunders Dictionary & Encyclopedia of Laboratory Medicine and Technology, 1984)Nitrogen Dioxide: Nitrogen oxide (NO2). A highly poisonous gas. Exposure produces inflammation of lungs that may only cause slight pain or pass unnoticed, but resulting edema several days later may cause death. (From Merck, 11th ed) It is a major atmospheric pollutant that is able to absorb UV light that does not reach the earth's surface.Models, Biological: Theoretical representations that simulate the behavior or activity of biological processes or diseases. For disease models in living animals, DISEASE MODELS, ANIMAL is available. Biological models include the use of mathematical equations, computers, and other electronic equipment.Reactive Nitrogen Species: Nitrogenous products of NITRIC OXIDE synthases, ranging from NITRIC OXIDE to NITRATES. These reactive nitrogen intermediates also include the inorganic PEROXYNITROUS ACID and the organic S-NITROSOTHIOLS.Carbon: A nonmetallic element with atomic symbol C, atomic number 6, and atomic weight [12.0096; 12.0116]. It may occur as several different allotropes including DIAMOND; CHARCOAL; and GRAPHITE; and as SOOT from incompletely burned fuel.Fertilizers: Substances or mixtures that are added to the soil to supply nutrients or to make available nutrients already present in the soil, in order to increase plant growth and productivity.Nitrogen Oxides: Inorganic oxides that contain nitrogen.Diet: Regular course of eating and drinking adopted by a person or animal.Soil: The unconsolidated mineral or organic matter on the surface of the earth that serves as a natural medium for the growth of land plants.Ammonia: A colorless alkaline gas. It is formed in the body during decomposition of organic materials during a large number of metabolically important reactions. Note that the aqueous form of ammonia is referred to as AMMONIUM HYDROXIDE.Biomass: Total mass of all the organisms of a given type and/or in a given area. (From Concise Dictionary of Biology, 1990) It includes the yield of vegetative mass produced from any given crop.PII Nitrogen Regulatory Proteins: A family of signal transducing adaptor proteins that control the METABOLISM of NITROGEN. They are primarily found in prokaryotes.Nitrates: Inorganic or organic salts and esters of nitric acid. These compounds contain the NO3- radical.Phosphorus: A non-metal element that has the atomic symbol P, atomic number 15, and atomic weight 31. It is an essential element that takes part in a broad variety of biochemical reactions.Nutritive Value: An indication of the contribution of a food to the nutrient content of the diet. This value depends on the quantity of a food which is digested and absorbed and the amounts of the essential nutrients (protein, fat, carbohydrate, minerals, vitamins) which it contains. This value can be affected by soil and growing conditions, handling and storage, and processing.Molecular Sequence Data: Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories.Digestion: The process of breakdown of food for metabolism and use by the body.Amino Acids: Organic compounds that generally contain an amino (-NH2) and a carboxyl (-COOH) group. Twenty alpha-amino acids are the subunits which are polymerized to form proteins.Energy Intake: Total number of calories taken in daily whether ingested or by parenteral routes.Animal Nutritional Physiological Phenomena: Nutritional physiology of animals.Nutritional Requirements: The amounts of various substances in food needed by an organism to sustain healthy life.Food: Any substances taken in by the body that provide nourishment.Nutritional Physiological Phenomena: The processes and properties of living organisms by which they take in and balance the use of nutritive materials for energy, heat production, or building material for the growth, maintenance, or repair of tissues and the nutritive properties of FOOD.Quaternary Ammonium Compounds: Derivatives of ammonium compounds, NH4+ Y-, in which all four of the hydrogens bonded to nitrogen have been replaced with hydrocarbyl groups. These are distinguished from IMINES which are RN=CR2.Culture Media: Any liquid or solid preparation made specifically for the growth, storage, or transport of microorganisms or other types of cells. The variety of media that exist allow for the culturing of specific microorganisms and cell types, such as differential media, selective media, test media, and defined media. Solid media consist of liquid media that have been solidified with an agent such as AGAR or GELATIN.Animal Feed: Foodstuff used especially for domestic and laboratory animals, or livestock.Plant Roots: The usually underground portions of a plant that serve as support, store food, and through which water and mineral nutrients enter the plant. (From American Heritage Dictionary, 1982; Concise Dictionary of Biology, 1990)Biological Products: Complex pharmaceutical substances, preparations, or matter derived from organisms usually obtained by biological methods or assay.Ecosystem: A functional system which includes the organisms of a natural community together with their environment. (McGraw Hill Dictionary of Scientific and Technical Terms, 4th ed)Biological Assay: A method of measuring the effects of a biologically active substance using an intermediate in vivo or in vitro tissue or cell model under controlled conditions. It includes virulence studies in animal fetuses in utero, mouse convulsion bioassay of insulin, quantitation of tumor-initiator systems in mouse skin, calculation of potentiating effects of a hormonal factor in an isolated strip of contracting stomach muscle, etc.Urea: A compound formed in the liver from ammonia produced by the deamination of amino acids. It is the principal end product of protein catabolism and constitutes about one half of the total urinary solids.Glutamate-Ammonia Ligase: An enzyme that catalyzes the conversion of ATP, L-glutamate, and NH3 to ADP, orthophosphate, and L-glutamine. It also acts more slowly on 4-methylene-L-glutamate. (From Enzyme Nomenclature, 1992) EC 18.104.22.168.Plant Leaves: Expanded structures, usually green, of vascular plants, characteristically consisting of a bladelike expansion attached to a stem, and functioning as the principal organ of photosynthesis and transpiration. (American Heritage Dictionary, 2d ed)Bacterial Proteins: Proteins found in any species of bacterium.Bacteria: One of the three domains of life (the others being Eukarya and ARCHAEA), also called Eubacteria. They are unicellular prokaryotic microorganisms which generally possess rigid cell walls, multiply by cell division, and exhibit three principal forms: round or coccal, rodlike or bacillary, and spiral or spirochetal. Bacteria can be classified by their response to OXYGEN: aerobic, anaerobic, or facultatively anaerobic; by the mode by which they obtain their energy: chemotrophy (via chemical reaction) or PHOTOTROPHY (via light reaction); for chemotrophs by their source of chemical energy: CHEMOLITHOTROPHY (from inorganic compounds) or chemoorganotrophy (from organic compounds); and by their source for CARBON; NITROGEN; etc.; HETEROTROPHY (from organic sources) or AUTOTROPHY (from CARBON DIOXIDE). They can also be classified by whether or not they stain (based on the structure of their CELL WALLS) with CRYSTAL VIOLET dye: gram-negative or gram-positive.Amino Acid Sequence: The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION.Fermentation: Anaerobic degradation of GLUCOSE or other organic nutrients to gain energy in the form of ATP. End products vary depending on organisms, substrates, and enzymatic pathways. Common fermentation products include ETHANOL and LACTIC ACID.Energy Metabolism: The chemical reactions involved in the production and utilization of various forms of energy in cells.Time Factors: Elements of limited time intervals, contributing to particular results or situations.Biological Therapy: Treatment of diseases with biological materials or biological response modifiers, such as the use of GENES; CELLS; TISSUES; organs; SERUM; VACCINES; and humoral agents.Mutation: Any detectable and heritable change in the genetic material that causes a change in the GENOTYPE and which is transmitted to daughter cells and to succeeding generations.Gene Expression Profiling: The determination of the pattern of genes expressed at the level of GENETIC TRANSCRIPTION, under specific circumstances or in a specific cell.Signal Transduction: The intracellular transfer of information (biological activation/inhibition) through a signal pathway. In each signal transduction system, an activation/inhibition signal from a biologically active molecule (hormone, neurotransmitter) is mediated via the coupling of a receptor/enzyme to a second messenger system or to an ion channel. Signal transduction plays an important role in activating cellular functions, cell differentiation, and cell proliferation. Examples of signal transduction systems are the GAMMA-AMINOBUTYRIC ACID-postsynaptic receptor-calcium ion channel system, the receptor-mediated T-cell activation pathway, and the receptor-mediated activation of phospholipases. Those coupled to membrane depolarization or intracellular release of calcium include the receptor-mediated activation of cytotoxic functions in granulocytes and the synaptic potentiation of protein kinase activation. Some signal transduction pathways may be part of larger signal transduction pathways; for example, protein kinase activation is part of the platelet activation signal pathway.Eating: The consumption of edible substances.Glucose: A primary source of energy for living organisms. It is naturally occurring and is found in fruits and other parts of plants in its free state. It is used therapeutically in fluid and nutrient replacement.Poaceae: A large family of narrow-leaved herbaceous grasses of the order Cyperales, subclass Commelinidae, class Liliopsida (monocotyledons). Food grains (EDIBLE GRAIN) come from members of this family. RHINITIS, ALLERGIC, SEASONAL can be induced by POLLEN of many of the grasses.Minerals: Native, inorganic or fossilized organic substances having a definite chemical composition and formed by inorganic reactions. They may occur as individual crystals or may be disseminated in some other mineral or rock. (Grant & Hackh's Chemical Dictionary, 5th ed; McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)Eutrophication: The enrichment of a terrestrial or aquatic ECOSYSTEM by the addition of nutrients, especially nitrogen and phosphorus, that results in a superabundant growth of plants, ALGAE, or other primary producers. It can be a natural process or result from human activity such as agriculture runoff or sewage pollution. In aquatic ecosystems, an increase in the algae population is termed an algal bloom.Biological Markers: Measurable and quantifiable biological parameters (e.g., specific enzyme concentration, specific hormone concentration, specific gene phenotype distribution in a population, presence of biological substances) which serve as indices for health- and physiology-related assessments, such as disease risk, psychiatric disorders, environmental exposure and its effects, disease diagnosis, metabolic processes, substance abuse, pregnancy, cell line development, epidemiologic studies, etc.Glutamine: A non-essential amino acid present abundantly throughout the body and is involved in many metabolic processes. It is synthesized from GLUTAMIC ACID and AMMONIA. It is the principal carrier of NITROGEN in the body and is an important energy source for many cells.Gene Expression Regulation, Bacterial: Any of the processes by which cytoplasmic or intercellular factors influence the differential control of gene action in bacteria.Nitrogen Mustard Compounds: A group of alkylating agents derived from mustard gas, with the sulfur replaced by nitrogen. They were formerly used as toxicants and vesicants, but now function as antineoplastic agents. These compounds are also powerful mutagens, teratogens, immunosuppressants, and carcinogens.Base Sequence: The sequence of PURINES and PYRIMIDINES in nucleic acids and polynucleotides. It is also called nucleotide sequence.
"Nitrogen Response of Fluted Pumpkin (Telfairia occidentalis Hook. F) Grown Sole or Intercropped with Banana." Nutrient Cycling ... "Fluted Pumpkin, Telfairia occidentalis: West African Vegetable Crop." School of Biological Sciences, University of Port- ...
Nitrogen is a common element in nature and an essential plant nutrient. Approximately 78% of Earth's atmosphere is nitrogen (N2 ... As nitrogen naturally cycles through the air, water and soil it undergoes various chemical and biological transformations. ... Regional increases of nitrogen fertilizer use are expected to be 67% by Asia, 18% by the Americas, 10% by Europe, 3% by Africa, ... Nitrogen promotes plant growth. Livestock then eat the crops producing manure, which is returned to the soil, adding organic ...
Olsen, C. (1970) On biological nitrogen fixation in nature, particularly in blue-green algae. Comptes Rendus des Travaux du ... Olsen, C. (1958) Iron uptake in different plant species as a function of the pH value of the nutrient solution. Physiologia ... Olsen, C. (1932) Studier on nitrogen fixation. I. Nitrogen fixation in the dead leaves of forest beds. Comptes Rendus des ... Olsen, C. (1948). The mineral, nitrogen and sugar contents of beech leaves and beech leaf sap at various times. Comptes Rendus ...
Due to excessive nutrients, especially nitrogen and phosphorus, these water bodies are able to support an abundance of aquatic ... Mesotrophic soils have moderate nutrient levels. A eutrophic body of water, commonly a lake or pond, has high biological ... The quantities of nitrogen, phosphorus, and other biologically useful nutrients are the primary determinants of a body of ... A water body situated in a nutrient-rich region with high net primary productivity may be naturally eutrophic. Nutrients ...
Without the nutrients available, some species that provide important biological niches to the ecosystem may be eradicated. In ... As it slowly decomposes, it supplies nutrients, particularly potassium, phosphorus, and nitrogen, that are necessary for the ... They often mix the nutrients into the soil, out of the reach of all but the deeper tree roots. Nutrients may then be leached ... By redistributing nutrients, mixing soil layers, and creating pores in the soil, they can affect the characteristics of the ...
... also contains the nutrients nitrogen and phosphorus. Sewage contains human feces, and therefore often contains pathogens ... The organic matter of sewage is measured by determining its biological oxygen demand (BOD) or the chemical oxygen demand (COD ... Sewage contains nutrients that may cause eutrophication of receiving water bodies; and can lead to ecotoxicity. A system of ...
Whales carry nutrients such as nitrogen from the depths back to the surface. This functions as an upward biological pump, ... reversing an earlier presumption that whales accelerate the loss of nutrients to the bottom. This nitrogen input in the Gulf of ... Whales defecate at the ocean's surface; their excrement is important for fisheries because it is rich in iron and nitrogen. The ... Loss of the habitat and nutrients provided by kelp forests leads to profound cascade effects on the marine ecosystem. North ...
Although crop residues contain both macro- and micro nutrients, only values for the macro nutrients nitrogen, phosphorus, ... The biological processes involved in soil nutrient cycles are complex. As a rough guide, cereal straw releases about 10 to 15 ... Nutrients from residue are not fully recovered by crops. Just like fertilizer nutrients, nutrients released from crop residue ... whereas cereal straw would reduce next year's soil supply of available nutrients. Over time, the nutrients fixed by soil ...
These organisms may provide crops valuable nutrients, such as through nitrogen fixation. There are several ways in which ... Additionally, reducing the homogeneity of the crop can potentially increase the barriers against biological dispersal of pest ... Some plants are used to suppress weeds or provide nutrients. Delicate or light-sensitive plants may be given shade or ... It is particularly important not to have crops competing with each other for physical space, nutrients, water, or sunlight. ...
Eutrophication - an increase in chemical nutrients - typically compounds containing nitrogen or phosphorus - in an ecosystem. ... Fronts are usually associated with high biological activity and high abundance of highly migratory resources such as tuna. They ... Nutrient upwelling - Nutrient upwelling is the 'welling-up' of deeper water that is usually richer in nutrients than surface ... Upwelling - the process by which water, usually cold and nutrient-rich, rises from a deeper to a shallower depth. This is often ...
Macro- and mesofauna break down plant residues to release Nitrogen as part of nutrient cycling. "Macrofauna and Mesofauna". ... In agricultural soils, most of the biological activity occurs in the top 20 centimetres (7.9 in), the soil biomantle or plow ... Animal residues are higher in nitrogen than plant residues with respect to the total carbon in the residue. Some Nitrogen ... may considerably increase Nitrogen mineralization because the bacteria are broken down and the nitrogen is released. ...
The nitrogen materials react as bases by themselves, or after decomposition. The addition of ammonia or urea causes numerous ... Chemical and Biological Effects of Buried Human Remains. Boca Raton: CRC. pp. 67-107. ISBN 1-4200-6991-8. Raut JK, Suzuki A, ... the high alkaline conditions interrupts the process of nutrient recycling. The mechanisms of colonization, establishment, and ... fungi are fungi that develop fruit bodies exclusively or relatively abundantly on soil that has had ammonia or other nitrogen- ...
However, fungi are able to take up the nutrients produced by biological soil crusts at lower water potentials, and keep them in ... Nitrogen cycling mediated by biological soil crusts and arbuscular mycorrhizal fungi. Ecology 84: 1553-1562. Skujins, R.G. 1976 ... In the bare soil between plants, biological soil crusts are often present. Crust microorganisms can fix carbon and nitrogen ... Fungi are an integral part of the biological soil crust community, and similar fungal taxa have been found in biological soil ...
... relative to nitrogen (N) has tremendous consequences for the ocean biological production. The change in nutrient ratios ... Silicate, or silicic acid (H4SiO4), is an important nutrient in the ocean. Unlike the other major nutrients such as phosphate, ... The Pacific (characterized by nutrient poor surface waters, and deep nutrient rich waters) and Atlantic Ocean circulations, are ... Some equatorial regions of upwelling, where nutrients are abundant and productivity is high, are also characterized by local ...
Thus CWD is important actor contributing to soil nutrients cycles. CWD, while itself not particularly rich in nitrogen, ... Scientific studies show that coarse woody debris can be a significant contributor to biological carbon sequestration. Trees ... contributes nitrogen to the ecosystem by acting as a host for nonsymbiotic free-living nitrogen-fixing bacteria. ... Coarse woody debris and its subsequent decomposition recycles nutrients that are essential for living organisms, such as carbon ...
Flood tides coming from the ocean bring coastal nutrients like nitrogen and phosphorus into the estuary. During mixing events, ... and biological processes. Yaquina Bay experiences mixed semidiurnal tides, ranging from 1.9-2.5 m (6.2-8.2 ft) daily. The ... The river provides nutrients for the Bay and supports a variety of biology. Sediments that are found within Yaquina Bay are ... Mud shrimp also live in mudflats, and they play an important role in nutrient cycling within the estuary. Burrows in the mud ...
This is generally true of freshwater environments, whereas nitrogen is more often the limiting nutrient in marine (seawater) ... In biological systems, phosphorus is found as a free phosphate ion[when defined as?] in solution and is called inorganic ... Once used, it is often a limiting nutrient in environments, and its availability may govern the rate of growth of organisms. ... An important occurrence of phosphates in biological systems is as the structural material of bone and teeth. These structures ...
Nitrogen fertilizers whose consumption has doubled between 1980 and 1993 present another source of pollution. Water hyacinth ... It is combated with mechanical and biological technologies. Salinity is another important water quality issue. Drainage return ... flourishing at the downstream of water ways due to increased nutrients lead to clogging of canals. ... Groundwater is contaminated from nitrogen and fertilisers (the use of which has quadrupled between 1960 and 1988) and the ...
... and heterotrophic bacteria mediate carbon, nitrogen, oxygen, and other nutrient fluxes in marine ecosystems. It ... Algae Bacterioplankton Biological pump Fungus Phytoplankton Zooplankton Jones, E.B.G., Hyde, K.D., & Pang, K.-L., eds. (2014). ... Furthermore, this difference in distribution may vary between seasons due to nutrient availability. Aquatic fungi survive in a ... Similar to bacterioplankton, these aquatic fungi play a significant role in heterotrophic mineralization and nutrient cycling. ...
Nutrients such as nitrogen and phosphorus can cause or exacerbate eutrophication of fresh water bodies such as lakes and rivers ... Organic matter dissolved in fresh water, measured by biological oxygen demand (BOD), changes ecological characteristics. ... Nitrogen oxides (NOx) sulfur oxides (SOx) and carbon dioxide (CO2) are all emitted during pulp and paper manufacturing. NOx and ... Wastewater discharges for a pulp and paper mill contains solids, nutrients and dissolved organic matter such as lignin. It also ...
See main article Nutrient pollution.) Seaweed farming can be an actor in biological carbon sequestration. The practice of ... is the practice of farming and harvesting shellfish and seaweed for the purpose of removing nitrogen and other nutrients from ... "Nutrient bioextraction" is the preferred term for bioremediation involving cultured plants and animals. Nutrient bioextraction ... The nutrients from the river would help the seaweed to grow. In the 1940s, the Japanese improved this method by placing nets of ...
Additional nitrogen and other nutrients are also made available for root uptake by decomposing organic matter in the substrate ... Appropriate handling of the nitrogen cycle, along with a balanced food supply and consideration of biological loading, is ... Activated carbon filters absorb nitrogen compounds and other toxins from the water. Biological filters provide a medium ... Although called the nitrogen "cycle" by hobbyists, in aquaria the cycle is not complete: nitrogen must be added (usually ...
... and nutrients like nitrogen and phosphorus. Physical treatments include coarse sand, sedimentation, and screening through ... Biological processes include the use of ultraviolet for disinfection, membrane bioreactors, RBC, and SBR. Reverse osmosis is a ... Other cities in the state began using sewage for irrigation, too, recognizing it as a source of water and nutrients in an arid ... Secondary: Biological process of removing organic matter and suspended material. Tertiary: Can involve physical and chemical ...
This explains the high rate of nutrient turnover in deep sea sediments. The release of nutrients from infected bacteria ... Marine viruses may play an important role in the carbon cycle by increasing the efficiency of the biological pump. The argument ... nitrogen and phosphorus cycles, but the exact influences are currently not understood. ... This would increase the efficiency of the biological pump. Mann, NH (2005-05-17). "The Third Age of Phage". PLoS Biol. United ...
Appropriate handling of the nitrogen cycle, along with supplying an adequately balanced food supply and considered biological ... Several nutrient cycles are important in the aquarium. Dissolved oxygen enters the system at the surface water-air interface. ... When plants metabolize nitrogen compounds, they remove nitrogen from the water by using it to build biomass that decays more ... Biologically, biological loading refers to the rate of biological decay in proportion to tank volume. Adding plants to an ...
Main article: Nutrient cycle. Many of the Earth's elements and minerals (or mineral nutrients) are contained within the tissues ... Linkages connect to nodes in a food web, which are aggregates of biological taxa called trophic species. Trophic species are ... Ecologists employ stoichiometry to analyze the ratios of the main elements found in all organisms: carbon (C), nitrogen (N), ... Bacteria that live in detrital sediments create and cycle nutrients and biominerals. Food web models and nutrient cycles ...
Amide Nitrogen Fertilizer. Other Names:. Ammonium Sulfate. Mf:. (Nh4)2so4. Trademark:. ML. Transport Package:. 50kg/PP. ... It can also be used as raw materials for biological fertilizer, compound fertilizer, organic fertilizer, etc.. Our Services: ... The grass clippings help to add essential nutrients back into the soil ...
it provides wide span organic nutrient to plants, including rich content of organic nitrogen, humic acid, fulvic acid as well ... When stored under normal conditions in original unopened containers, no change of its physical, chemical and biological ... Nutrients comprehensive.. High fulvic and humic acid content with lower moisture, strong effect.. More functional groups, more ...
... evaluation of a biological filter to meet low total nitrogen discharge limits. New regulations aiming to reduce total pollutant ... loads entering receiving waters are emphasizing more stringent nutrient discharge ... ... Addressing the nutrient crisis: evaluation of a biological filter to meet low total nitrogen discharge limits. 0 ... No comments were found for Addressing the nutrient crisis: evaluation of a biological filter to meet low total nitrogen ...
show that microbes aid ants by recycling nitrogen into bio-available amino acids. This function is conserved across the turtle ... Nitrogen acquisition is a major challenge for herbivorous animals, and the repeated origins of herbivory across the ants have ... What do we know about biological nitrogen fixation in insects? Evidence and implications for the insect and the ecosystem * ... Herbivorous turtle ants obtain essential nutrients from a conserved nitrogen-recycling gut microbiome. *Yi Hu. ORCID: orcid.org ...
Biological Nitrogen Fixation Associated with Rice Production by Azit Kumar Podder, 9780792341970, available at Book Depository ... Nutrient Uptake and Cycling in Forest Ecosystems L.O. Nilsson 05 Nov 2012 ... Biological nitrogen fixation (BNF) has become important in rice farming systems because this process diminishes the need for ... Opportunities for Biological Nitrogen Fixation in Rice and Other Non-Legumes J. K. Ladha ...
Article Three Stage Biological Filter Process to Achieve Extremely Low Total Nitrogen Discharge to the Long Island Sound. ... to simulate nutrient limited and two nutrient supplemented conditions, respectively. Research found that air-scour versus water ... Three Stage Biological Filter Process to Achieve Extremely Low Total Nitrogen Discharge to the Long Island Sound. 0 ... No comments were found for Three Stage Biological Filter Process to Achieve Extremely Low Total Nitrogen Discharge to the Long ...
Make research projects and school reports about Nitrogen Fixation easy with credible articles from our FREE, online ... and pictures about Nitrogen Fixation at Encyclopedia.com. ... Nitrogen Fixation. Biological nitrogen (N2) fixation is the ... typically plants of poorly drained and nutrient-depleted habitats, form symbiotic associations with nitrogen-fixing ... Nitrogen Fixation Biology COPYRIGHT 2002 The Gale Group Inc.. Nitrogen Fixation. Nitrogen fixation refers to the conversion of ...
Addressing poverty alleviation via the expanded use of biological nitrogen fixation in agriculture was the theme of the 15th ... International Congress on Nitrogen Fixation. Because nitrogen-fixation ... Plant Growth-Promoting Diazotrophs: Optimising their Role as Key Agents in Achieving More Efficient Nutrient Use by Field Crops ... Biological Nitrogen Fixation: Towards Poverty Alleviation through Sustainable Agriculture. Book Subtitle. Proceedings of the ...
... behavior of nitrogen in the soil; nutrient availability to plants; agricultural waste management; biological control of insects ... A Master of Science degree in an appropriate agricultural, environmental, biological, or physical science. Satisfactory scores ...
... behavior of nitrogen in the soil; nutrient availability to plants; agricultural waste management; biological control of insects ...
Soil nitrogen transformations and losses; Nutrient uptake and use by the plant; Stable isotopes in studies of plant metabolism ... The 15N natural abundance method for measurement of biological nitrogen fixation; Applications of 15N methods to measurement of ... biological nitrogen fixation; Stable isotopes in soil organic matter studies; ... Measurement of biological nitrogen fixation using 15N additions; ... Soil nitrogen transformations and losses; Nutrient uptake and ...
contribution to nitrogen balance. Plant Soil 141:41-55. Roper MM, Ladha JK (1995) Biological N2 fixation by heterotrophic and ... Evaluation of rice-legume-rice cropping system on grain yield, nutrient uptake, nitrogen fixation, and chemical, physical, and ... 2009) Evaluation of rice-legume-rice cropping system on grain yield, nutrient uptake, nitrogen fixation, and chemical, physical ... Choudhury ATMA, Kennedy IR (2004) Prospects and potentials for systems of biological. nitrogen fixation in sustainable rice ...
Nutrient balance and nitrogen use nitrogen toxicity in plants. Dinitrogen fixation in Leguminous crop plants. Enhancing ... Optimization of biological recycling of plant nutrients in livestock waste by utilizing waste heat from cooling water by ... Use of nitrogen from manue. Diagnosis of nitrogen deficiency in plants. Nitrogen and yield potential. Efficient use of nitrogen ... Plant use of soil nitrogen. Conventional nitrogen fertilizers. Slow-Release nitrogen fertilizers. Use of nitrogen from ...
Use of the 15N natural abundance technique to quantify biological nitrogen fixation by woody perennials. Nutrient Cycles ... Factors influencing nitrogen fixation and nitrogen release in biological soil crusts. In: Belnap J, Lange OL (eds) Biological ... Nitrogen Input Pathways into Sand Dunes: Biological Fixation and Atmospheric Nitrogen Deposition. ... and the biological fixation of atmospheric nitrogen N2. Biological fixation is carried out by free-living bacteria, Fabaceae- ...
These materials produced eluates with lower concentrations of nutrients than the leachates from barley grains. However, as ... an adequately high carbon-to-nitrogen (C : N) ratio is key to sustain denitrification. We evaluated three natural materials ( ... and peanut shells released carbon rather steadily and so they would not require frequent replenishment from biological reactors ... woodchips yielded lower amounts of suspended solids, they constitute an adequate exogenous source for the biological treatment ...
The two major nutrients are nitrogen and phosphorus. Nitrogen is created by biological fixation, and phosphorus is created by ... Energy and nutrients in the form of dead organic material *Large population oscillations ... It is noted for its frost-molded landscapes, extremely low temperatures, little precipitation, poor nutrients, and short ... Dead organic material functions as a nutrient pool. ...
Nitrogen is arguably the most important nutrient required by plants. However, the availability of nitrogen is limited in many ... Section 18 Nitrogen Fixation and Cereals. Chapter 108. The Quest for Biological Nitrogen Fixation in Cereals : A Perspective ... Biological nitrogen fixation is an alternative to nitrogen fertilizer. It is carried out by prokaryotes using an enzyme complex ... Biological Nitrogen Fixation, 2 Volume Set. Frans J. de Bruijn (Editor). ISBN: 978-1-118-63721-0 June 2015 Wiley-Blackwell 2250 ...
... producing oxygen through photosynthesis while conducting oxygen-sensitive nitrogen fixation. How nutr ... Some bacteria perform a biological juggling act, producing oxygen through photosynthesis while conducting oxygen-sensitive ... Capone noted that the technique was unique in allowing visualization of nitrogen in the cell using nitrogen-15 instead of the ... the researchers added carbon dioxide and nitrogen gas enriched in the stable isotopes carbon-13 and nitrogen-15, respectively. ...
Right) The biological conditions associated with each microarray are shown as blue elements. Only annotations that were ... nitrogen depletion (P , 8.13 × 10-5), stationary phase (P , 4.17 × 10-8), and response to glucose starvation (P , 2.4 × 10-4). ... The TOR pathway is active in favorable nutrient conditions and promotes cell growth. When nutrients become limiting (or cells ... Sfp1 is a stress- and nutrient-sensitive regulator of ribosomal protein gene expression. Rosa M. Marion, Aviv Regev, Eran Segal ...
... are limited nutrients in terrestrial ecosystems, and their limitation patterns are being changed by the increase in N ... 2015) Signatures of nutrient limitation and co-limitation: responses of autotroph internal nutrient concentrations to nitrogen ... Use of Nitrogen to Phosphorus Ratios in Plant Tissue as an Indicator of Nutrient Limitation and Nitrogen Saturation. Journal of ... Nutrient limitation Nitrogenphosphorus Nitrogen deposition Soil enzyme Dryhot valley Dodonaea viscosa This is a preview of ...
Indicators of eutrophication: nutrients (eg. nitrogen and phosphorus), and various biological effect variables (eg. chlorophyll ... Biological indicator organisms and analysis of the various biological communities are used to assess the ecological state of ... Investigation of biological organisms such as macroinvertebrates in rivers and zoobenthos in lakes and marine areas is usually ... a 50 per cent reduction of nitrogen loading to surface waters, no pesticides in drinking water, etc.), and the purpose of ...
Biological Nitrogen Fixation 5. Application of Vermiculture Biotechnology 6. Composting of Agricultural and Industrial Wastes 7 ... Integrated Nutrient Management towards Sustainable Agriculture 11. Integrated Farming Systems 12. Case Studies Printed Pages: ... integrated nutrient management, farming systems and case studies of organic farming. Selected literature is presented for ... Biological Nitrogen Fixation 5. Application of Vermiculture Biotechnology 6. Composting of Agricultural and Industrial Wastes 7 ...
Biological Sciences. keywords. ultraviolet-B radiation, nutrition, maoze. in Scientific World Journal. volume. 2012. publisher ... Ultraviolet-B radiation and nitrogen affect nutrient concentrations and the amount of nutrients acquired by above-ground organs ... Ultraviolet-B radiation and nitrogen affect nutrient concentrations and the amount of nutrients acquired by above-ground organs ... Nutrient uptake decreased under high UV-B and increased with increasing... (More). UV-B radiation effects on nutrient ...
5.2 Sources of nitrogen and phosphorus to soil-plant systems 134. 5.3 Chemical and biological processes of nutrient cycling, ... 5 Nitrogen and phosphorus cycles and their management 132. Phil M. Haygarth, Richard D. Bardgett, and Leo M. Condron ... 11 Sustainable management of soil and plant health by optimising soil biological function 366. Dominic Standing and Ken Killham ... Subject areas covered range from crop science and genetics; soil fertility and organic matter; nitrogen and phosphoros cycles ...
The increase of this nutrient, known as fixed nitrogen, was studied in coral. The findings give researchers new insight into ... New evidence suggests that a nutrient that is both essential to life and an environmental scourge when present in large ... Humans carry out a non-biological form of the reaction to make fertilizer for agriculture. However, too much fixed nitrogen can ... Nitrogen is a nutrient essential to the health of the ocean. Phytoplankton rely on fixed nitrogen to photosynthesize and grow, ...
Compound fertilizerFixationProcessesSoilsUptakePhosphorus RemovalLiving organismsWastewater Treatment PlantsBiomassNitrificationEcosystemsDepositionNitrateMicroorganismsPlantsDenitrificationSludgePlant nutrientsOrganic nitrogenAmmoniumMineralizationAbstractFertilizersEfficiencyEssential nutrientCycling in AgroecosystemsTake up nitrogenWatersChemicalPhytoplanktonEnhanced nutrient removalNitratesAgriculturalExcess nutrientsAlgaeEnrichmentMicrobial communityEcosystemEutrophicationIntegrated nutrient managementDynamicsSymbiotic interactionWastewatersMacronutrientsAmount of nutrients2002SedimentGenomicsResponse to nutrientSpeciesWaterCropsEfficient nitrogenBiologyLimitsDischargePollutantsFiltration
- Biological nitrogen fixation (BNF) has become important in rice farming systems because this process diminishes the need for expensive chemical fertilizers which have been associated with numerous health and environmental problems. (bookdepository.com)
- Nitrogen fixation refers to the conversion of atmospheric nitrogen gas (N 2 ) into a form usable by plants and other organisms. (encyclopedia.com)
- Nitrogen fixation is conducted by a variety of bacteria, both as free-living organisms and in symbiotic association with plants. (encyclopedia.com)
- Because it is the principal source of the nitrogen in the soil, nitrogen that plants need to grow, nitrogen fixation is one of the most important biochemical processes on Earth . (encyclopedia.com)
- Even modern agricultural systems depend on nitrogen fixation by alfalfa, clover, and other legumes to supplement chemical nitrogen fertilizers. (encyclopedia.com)
- Soils deficient in molybdenum cannot sustain effective nitrogen fixation, and monitoring soil for this element is important to ensure maximum fixation in managed fields or pastures. (encyclopedia.com)
- This volume covers recent developments in both fundamental and applied research in biological nitrogen fixation. (springer.com)
- It emphasizes the application of biological nitrogen fixation for sustainable agriculture, which should lead to poverty alleviation, environmental protection, and good agricultural practices generally. (springer.com)
- The evolution of symbioses and nitrogen fixation are also covered in this volume. (springer.com)
- This volume, which covers the most recent data on the role of nitrogen fixation in agriculture and forestry and on the biology of both plants and nitrogen-fixing microbes, is intended to serve as a useful reference for students and researchers, both in the laboratory (academic and commercial) and in the field. (springer.com)
- Enhancing biological Dinitrogem Fixation in crop plants. (worldcat.org)
- The main N input pathways into the ecosystems are atmospheric deposition in wet, dry and gaseous forms, and the biological fixation of atmospheric nitrogen N 2 . (springer.com)
- Biological fixation is carried out by free-living bacteria, Fabaceae- Rhizobium symbiosis and associative symbiontic free-living cyanobacteria, as well as by cyanobacteria in lichens. (springer.com)
- In this paper, we present field measurements of biological N 2 fixation (BNF) obtained by the natural 15 N abundance method, and use these to estimate the annual nitrogen input by the soil crusts and R. raetam . (springer.com)
- We follow a novel approach for the natural 15 N abundance technique, by using the non-N2-fixing lichens Squamarina lentigeria and S. cartilaginea (= S. crassa ) as reference in order to determine N 2 fixation by the biological crust in situ in the Negev desert. (springer.com)
- Arnibar JN, Anderson IC, Ringrose S, Macko SA (2003) Importance of nitrogen fixation in soil crusts of southern African arid ecosystems: acetylene reduction and stable isotope studies. (springer.com)
- Belnap J (2001) Factors influencing nitrogen fixation and nitrogen release in biological soil crusts. (springer.com)
- Belnap J (2002): Nitrogen fixation in biological soil crusts from southeast Utah, USA. (springer.com)
- Boddey RM, Peoples MB, Palmer B, Dart PJ (2000) Use of the 15 N natural abundance technique to quantify biological nitrogen fixation by woody perennials. (springer.com)
- Nitrogen is created by biological fixation, and phosphorus is created by precipitation. (berkeley.edu)
- Biological nitrogen fixation is an alternative to nitrogen fertilizer. (wiley.com)
- Biological Nitrogen Fixation is a comprehensive two volume work bringing together both review and original research articles on key topics in nitrogen fixation. (wiley.com)
- Chapters across both volumes emphasize molecular techniques and advanced biochemical analysis approaches applicable to various aspects of biological nitrogen fixation. (wiley.com)
- Volume 2 covers the symbiotic interaction of nitrogen fixing organisms with their host plants, including nodulation and symbiotic nitrogen fixation, plant and microbial "omics", cyanobacteria, diazotrophs and non-legumes, field studies and inoculum preparation, as well as nitrogen fixation and cereals. (wiley.com)
- Covering the full breadth of current nitrogen fixation research and expanding it towards future advances in the field, Biological Nitrogen Fixation will be a one-stop reference for microbial ecologists and environmental microbiologists as well as plant and agricultural researchers working on crop sustainability. (wiley.com)
- Some bacteria perform a biological juggling act, producing oxygen through photosynthesis while conducting oxygen-sensitive nitrogen fixation. (photonics.com)
- The researchers plan to use the spectrometry technique to examine a more complex bacterium in which photosynthesis and nitrogen fixation are not clearly compartmentalized. (photonics.com)
- In nitrogen fixation, nitrogen gas is converted into biologically useful (fixed) forms that are needed by living things. (princeton.edu)
- Global pattern and controls of biological nitrogen fixation under nutrient enrichment: A meta-analysis. (nih.gov)
- Spatially robust estimates of biological nitrogen (N) fixation imply substantial human alteration of the tropical N cycle. (nih.gov)
- Nutrient limitation of terrestrial free-living nitrogen fixation. (nih.gov)
- N 2 fixation associated with the bryophyte layer is suppressed by low levels of nitrogen deposition in boreal forests. (nih.gov)
- Nitrogen fixation does not balance fire-induced nitrogen losses in longleaf pine savannas. (nih.gov)
- At the global scale, biological N fixation is the largest source of N to the ocean, whereas anaerobic microbial processes are responsible for N losses ( 1 , 2 ). (pnas.org)
- His research focus remained in rhizobia, nitrogen fixation and bacterial genomics and he also set up the Plant Growth Promoting Rhizobacteria (PGPR) group in the CRS. (edu.au)
- Since moving to Deakin University in 2012 , he has continued his research focus on PGPRs, nitrogen fixation, soil microbiology and plant microbe interactions to improve crop production and reduce fertilizer inputs in farming systems. (edu.au)
- Nitrogen is also required in the production chlorophyll (a major component in plant photosynthesis), amino acids, ATP, and nucleic acids.Plants in particular obtain nitrogen through a process carried out by a specialized group of bacteria known as Biological Nitrogen-Fixation (BNF). (brightkite.com)
- The new study by BETCy puts a fresh perspective on the mechanism of biological nitrogen fixation as it occurs in vivo . (constantcontact.com)
- There, he worked on plant uptake of ions, especially iron, nitrogen fixation and calcicolous plants. (wikipedia.org)
- Olsen, C. (1932) Studier on nitrogen fixation. (wikipedia.org)
- I. Nitrogen fixation in the dead leaves of forest beds. (wikipedia.org)
- Also, nitrogen (N) can be provided to the plant through biological nitrogen fixation (BNF) by soil bacteria such as rhizobium. (scirp.org)
- Quantification of nitrogen inputs from biological nitrogen fixation to whole farm nutrient budgets of two dairy farms in Atlantic Canada. (gc.ca)
- The main processes of the nitrogen cycle are the fixation, ammonification, nitrification, and denitrification. (wikipedia.org)
- The nitrogen fixation is energetically costly due to chemical transformation and only about 10% of lichen are partnered with cyanobacteria. (wikipedia.org)
- As lichens absorb nitrogen through fixation, it will have a very strong negative reaction if the nitrogen availability changes indicating its sensitivity to environmental changes. (wikipedia.org)
- N2-fixing lichen species can only attain a certain amount of nitrogen as the addition of ammonium decreases its rate of N2-fixation, which decreases the amount of nitrogen that is exported into the adjacent hyphae. (wikipedia.org)
- In the bacterial processes involved in the mitigation of nitrogen pollution, an adequately high carbon-to-nitrogen (C : N) ratio is key to sustain denitrification. (hindawi.com)
- In these processes, the carbon-to-nitrogen (C : N) ratio is a key design parameter. (hindawi.com)
- How nutrients flow between the cells without disrupting the processes has not been totally clear. (photonics.com)
- Unlike the two-organism nitrification that is the basis for nearly all nitrogen removal processes, complete ammonia oxidizing (i.e. comammox) bacteria alone can completely convert ammonia to nitrate. (waterrf.org)
- The main objective of this project is to integrate carbon-efficient nitrogen (N) removal processes with biological phosphorus (bio-P) removal within a conventional biological nutrient removal system. (waterrf.org)
- Conventional biological nutrient removal (BNR) processes are energy-intensive and require sufficient carbon to reliably meet regulatory requirements. (waterrf.org)
- Communicating material in a practical manner for operators and technicians who regulate and troubleshoot their wastewater treatment processes, Wastewater Bacteria discusses the effective control and proper operation of aerobic (activated sludge) and anaerobic (anaerobic digesters) biological treatment units to ensure that an adequate, active, and appropriate population of bacteria is present in each treatment unit. (google.it)
- This straightforward manual equips plant technicians to meet these objectives with essential information to understand the biological processes and organisms involved in wastewater treatment. (google.it)
- In this research the nitrogen was removed in a biological filter using a combination of nitrification and denitrification processes. (scielo.org.za)
- Most of the pollutants are normally bound in the soil matrix by a variety of chemical, physical and biological processes, preventing these from reaching the groundwater. (scielo.org.za)
- But a lack of under standing of internal processes regulating nutrient and energy transformations and movements in ecosystems made it difficult to separate and quantify the effects of regulatory processes such as human activity. (nps.gov)
- By linking hydrology with other ecosystem processes, the "small watershed ecosystem" model permitted quantification of biogeochemical cycles, i.e., the movement and transformation of nutrients and energy between the biotic and abiotic components. (nps.gov)
- At our sites research emphasizes below-ground, physiochemical and biological processes, and microbial functional biodiversity. (nps.gov)
- Biological processes are the main driver of CO 2 absorption from the atmosphere to the ocean. (caltech.edu)
- Regarding the use of specialized processes to recover nutrients in a more purified form to be used as high-value fertilizer products, Young anticipates an increase in the amount of applications of these types of technologies. (waterworld.com)
- however, it may be reduced to nitrite through biological processes involving plants, microbes, etc. (cdc.gov)
- Nitrogen gas from the atmosphere can be converted to plant-usable forms, or "fixed," by lightning in the atmosphere, soil microorganisms such as Rhizobium and Azotobacter , and industrial processes. (earthsciweek.org)
- The goal of the volume is to facilitate cross-site synthesis and evaluation of ecosystem processes.Chapters cover methods for studying physical and chemical properties of soils, soil biological properties, and soil organisms, and they include work from many leaders in the field. (indigo.ca)
- From basic activated sludge systems to complete biological nutrient removal processes, Parkson has a solution. (parkson.com)
- Processes for the removal of nitrogen compounds from a supply of raw water are disclosed, including an initial denitrification step followed by aeration to release cell-bound nitrogen in the form of ammonium ions from the bacteria produced in the denitrification step without converting the ammonium ions into nitrate or nitrite ions, and precipitating the ammonium ions from the water to produce a substantially nitrogen free supply of water. (google.com)
- In this study, the performance of an AGS reactor was evaluated in terms of nitrogen removal via assimilation, nitrification, and denitrification processes during the formation and maturation of aerobic granules fed with real domestic wastewater. (iwaponline.com)
- This detritus is decomposed by bacteria through the processes called the nitrogen cycle. (mypets.net.au)
- Hierarchical cluster analysis based on similarity matrix of DGGE profiles revealed changes in bacterial community composition in soils due to differences in nutrient management, and these changes were seen to occur according to the states of C and N dynamics in acidic soil under RLR rotation. (warwick.ac.uk)
- Nitrogen Use in flooded rice soils. (worldcat.org)
- However, the availability of nitrogen is limited in many soils and although the earth's atmosphere consists of 78.1% nitrogen gas (N2) plants are unable to use this form of nitrogen. (wiley.com)
- However, little information concerns the plant growth and the soil biological responses to N and P additions among different soils simultaneously, and these responses may contribute to understand plant-soil interaction and predict plant performance under global change. (springer.com)
- Nitrate and Nitrite ions naturally occur in soils and waters as part of the earth's nitrogen cycle. (cdc.gov)
- Nitrogen exists naturally in soils, typically bound to organic matter and mineral soil material. (cdc.gov)
- 1321 words - 5 pages Influences on Soil Nitrogen Mineralization: Implications for Soil Restoration and Revegetation Introduction Nitrogen is a macronutrient essential to the growth of plants and is also one of the most deficient nutrients in most soils. (brightkite.com)
- Emissions of both sulphur dioxide and nitrogen oxides deposit in water, on vegetation and on soils as "acid rain", thereby increasing their acidity with adverse effects on flora and fauna. (unece.org)
- De-composition and nutrient release from leaf litter in Eucalyptus grandis plantations on three different soils in Entre Rios, Argentina. (academicjournals.org)
- Olsen, C. (1929) On the determination of nitrogen in soils: with special reference to the presence of nitrates and nitrites. (wikipedia.org)
- Uptake of organic nitrogen forms by roots and leaves. (worldcat.org)
- Nutrient uptake decreased under high UV-B and increased with increasing. (lu.se)
- The micro-organisms present in Mayan MicroZyme (MMZ) mineralize nutrients, produce and regulate nitrogen, , build organic matter in your soil, and improve fertility and fruit yields by increasing nutrient uptake and availability. (horticulturesource.com)
- In agricultural region, non N2 fixing lichen reflect uptake of NH3 emission indicating that it have lower nitrogen value. (wikipedia.org)
- This research examines a new side-stream enhanced biological phosphorus removal (EBPR) process (S2EBPR) that involves a side-stream anaerobic biological sludge hydrolysis and fermentation reactor to address the common. (waterrf.org)
- This project examined the use of enhanced biological phosphorus removal (EBPR) to treat nutrient-deficient industrial wastewater with widely varying organic loads. (waterrf.org)
- Biological and chemical methods for nitrogen and phosphorus removal from wastewater. (accessengineeringlibrary.com)
- From the Water Environment Federation, Nutrient Removal deals specifically with the process fundamentals of biological and chemical nitrogen and phosphorus removal in wastewater treatment plants. (accessengineeringlibrary.com)
- The book begins with an overview of the effects of nitrogen and phosphorus on the environment, then goes into specific sections on nitrogen and phosphorus removal. (accessengineeringlibrary.com)
- Chapters on modeling and troubleshooting nitrogen and phosphorus removal systems are included. (accessengineeringlibrary.com)
- Achieve excellent efficiencies of nitrogen and phosphorus removal, high SND in LASeM. (deepdyve.com)
- Living organisms need nitrogen because it is a part of the amino acids that make up proteins , and the nucleic acids that make up DNA (deoxyribonucleic acid) and RNA (ribonucleic acid). (encyclopedia.com)
- Nitrogen within living organisms is eventually decomposed and converted to atmospheric nitrogen (N 2 ). (encyclopedia.com)
- Productivity represents the flux of nutrients from the environment into living organisms. (reefkeeping.com)
- Nitrogen is a critical nutrient for all living organisms. (constantcontact.com)
- Although the majority of the Earth's atmosphere is made of up nitrogen gas (N 2 ), it cannot be used by most living organisms because of its high stability. (constantcontact.com)
- In an effort to enhance water quality in the Long Island Sound, New York State Department of Environmental Conservation has implemented stringent nitrogen discharge limits for Wastewater Treatment Plants that discharge to the Sound. (environmental-expert.com)
- Four Wastewater Treatment Plants owned and operated by Westchester County, New York are required to meet an average effluent total nitrogen discharge concentration of less than 4 mg/L. Due to significant land constraints and cold wastewater temperatures, Westchester County initiated several pilot studies targeted at meeting the new limit. (environmental-expert.com)
- Biological Nutrient Removal Operation in Wastewater Treatment Plants is intended to be a practical manual for plant managers and operators who needed current information on BNR. (chipsbooks.com)
- In 2005, states in the Chesapeake Bay region began to implement a new permitting process that limited the amount of nitrogen and phosphorus that significant wastewater treatment plants in the region could discharge. (chesapeakebay.net)
- Some states, including Pennsylvania and Virginia, have created nutrient trading programs that encourage wastewater treatment plants to design upgrades with greater nutrient reductions, then sell nutrient credits to other facilities. (chesapeakebay.net)
- Overenrichment of nutrients (nitrogen and phosphorus) increases the production of biomass in aquatic systems, thereby impairing the water quality and threatening the natural balance of these ecosystems. (hindawi.com)
- Besides, the aboveground biomass and leaf N concentration of D. viscosa were positively correlated with soil available N in Lixisols, but the aboveground biomass was negatively correlated with soil available P. Our results show similar nutrient limitation patterns between plant and soil microorganism in the condition of enough C, and the nutrient limitations differ across soil types. (springer.com)
- Allen AS, Schlesinger WH (2004) Nutrient limitations to soil microbial biomass and activity in loblolly pine forests. (springer.com)
- Ten termite mounds and ten similar sized control plots were surveyed for soil nutrients, tree species diversity and plant biomass removal by elephants. (cambridge.org)
- 90%, but the biological filter only became stable after about 2 months of operation, possibly due to desiccation of the biomass. (scielo.org.za)
- Microalgae absorb nitrogen in form of nitrate and phosphorus in form of phosphate from the wastewater and clean it by separating the nutrients as biomass. (schott.com)
- The mitigation of nitrogenous pollution mostly relies on biological treatments based on the well-known route ammonification-autotrophic nitrification-heterotrophic denitrification. (hindawi.com)
- Nitrification, the microbial oxidation of ammonia to nitrite and nitrate, occurs in a wide variety of environments and plays a central role in the global nitrogen cycle. (pnas.org)
- Soil Carbon and Nitrogen Availability: Nitrogen Mineralization, Nitrification, and Soil Respiration Potentials14. (indigo.ca)
- This study evaluated aerobic granulation and nitrogen removal via assimilation, nitrification, and denitrification of a system fed with real domestic wastewater. (iwaponline.com)
- After granule formation, assimilation accounted for less than 5% and nitrogen was mainly removed by partial nitrification up to nitrite, followed by denitrification via nitrite. (iwaponline.com)
- Average efficiencies of 86.6% for nitrification, 59.5% for denitrification, and 60.5% for total nitrogen were obtained in this period. (iwaponline.com)
- Nitrogen (N) and phosphorus (P) are limited nutrients in terrestrial ecosystems, and their limitation patterns are being changed by the increase in N deposition. (springer.com)
- However, too much fixed nitrogen can alter and disrupt natural ecosystems, especially those accustomed to very low levels, such as in the remote tropical ocean and most coral reefs. (princeton.edu)
- There is evidence that this excess nitrogen pollutes terrestrial ecosystems as well as fresh waters and coastal zones, where it fuels algae blooms that can outcompete other organisms. (princeton.edu)
- Nitrogen limitation of net primary productivity in terrestrial ecosystems is globally distributed. (nih.gov)
- Nitrogen (N) is an essential nutrient in the ocean and limits biological productivity in most marine ecosystems. (pnas.org)
- Since the 1930s, scientists recognized that ecosystems have detailed energy and nutrient input and output budgets, with nutrient supply as the factor most limiting biological growth. (nps.gov)
- Litterfall in terrestrial ecosystems represents the primary pathway for nutrient return to soil. (usda.gov)
- The three elements we examined were carbon, nitrogen and phosphorus due to their importance in ecosystems, and because of the tendency for the growth and reproduction of living things to be limited by access to these resources. (reefkeeping.com)
- Ecosystems are impacted by air pollution, particularly sulphur and nitrogen emissions, and ground-level ozone as it affects their ability to function and grow. (unece.org)
- Ultimately, acidification affects the ability of ecosystems to provide "ecosystem services", such as for example nutrient cycling and carbon cycling, but also water provision, on which the planet and human life is dependent. (unece.org)
- Nutrient overloads in aquatic ecosystems can cause algae blooms and ultimately a loss of oxygen, and of life. (unece.org)
- As ecosystems are impacted, so is the biological diversity. (unece.org)
- This album explains how the balance of sunlight, water and nutrients are fundamental to the process and how this balance acts to regulate individual ecosystems. (nottingham.ac.uk)
- N input by BNF of atmospheric nitrogen is compared with atmospheric nitrogen deposition. (springer.com)
- An international team of researchers, including those from Princeton University, reported an increase in anthropogenic nitrogen deposition, or "fixed" nitrogen in the environment resulting from human activity, in Dongsha Atoll, a coral reef in the South China Sea. (princeton.edu)
- Researchers tracked changes in atmospheric nitrogen deposition by measuring the fixed nitrogen contained in the core collected from a living Porites sp. (princeton.edu)
- An international team of researchers, including those from Princeton University, reported an increase in anthropogenic nitrogen deposition, or the deposition from the atmosphere of fixed nitrogen, resulting from human activities on Dongsha Atoll. (princeton.edu)
- While atmospheric models have predicted an increase in atmospheric nitrogen deposition on the open ocean, "there hasn't been any direct evidence to support these claims," said Ren. (princeton.edu)
- Global-scale impacts of nitrogen deposition on tree carbon sequestration in tropical, temperate, and boreal forests: A meta-analysis. (nih.gov)
- Photobiont will become less dependent of fungal nutrient supply when nitrogen deposition increases as it will be able to access its own nitrogen and it will stimulate photobiont, causing it to build up, resulting the increase in photosynthesis which increases carbon input. (wikipedia.org)
- However, for lichens that cannot increase their photobiont growth, nitrogen deposition can be damaging due to higher nitrogen concentration than their biological requirements. (wikipedia.org)
- Assesses the performance and potential limitations of RBF systems regarding removal of emerging micropollutants, TOC, and nutrients (ammonia, nitrate, and phosphorus). (waterrf.org)
- Nitrate and Nitrite are naturally occurring ionic species that are part of the earths nitrogen cycle. (cdc.gov)
- In nature, plants utilize nitrate as an essential nutrient. (cdc.gov)
- Nitrate accounts for the majority of the total available nitrogen in surface waters. (cdc.gov)
- Most plants obtain the nitrogen they need as inorganic nitrate from the soil solution. (brightkite.com)
- Nitrogen, which has several valence states, is present in the environment as dinitrogen (N 2 ), nitric oxide (NO), and nitrous oxide (N 2 O) gasses, as the ions ammonium (NH 4 + ), nitrite (NO 2 - ) and nitrate (NO 3 - ), and in organic forms such as proteins and enzymes. (earthsciweek.org)
- 2. As directed in instructions, use qualitative nitrate test strips to investigate some possible fates of nitrogen in the soil. (earthsciweek.org)
- Inherent biological nutrient removal makes the EcoCycle SBR a good choice for plants needing to meet current or future nitrate and phosphorus limits. (parkson.com)
- Nitrate (NO3-) (CAS No. 014797-55-8) is an inorganic anion resulting from the oxidation of elemental nitrogen. (globalsecurity.org)
- Ammonium, nitrate and organic nitrogen can be assimilated by lichen along with phosphorus as an important stimulants for cyanolichens. (wikipedia.org)
- It is a two-step biological process in which ammonia nitrogen is first converted into nitrates by microorganisms. (britannica.com)
- Mayan MicroZyme is a 100% organic and ecologically safe beneficial bacterial complex with multiple species of soil microorganisms that will increase fertility while providing vital nutrients to all types of plants and crops. (horticulturesource.com)
- Biological nutrient removal (BNR) uses microorganisms to remove nitrogen and phosphorus from wastewater during treatment. (chesapeakebay.net)
- Most nitrogen in soil is present in organic forms, and most of the transformations are mediated by soil microorganisms. (earthsciweek.org)
- In composting, a controlled biological process, microorganisms convert biodegradable hazardous material to innocuous, stabilized by-products, typically at elevated temperatures between 50 - 55 C. The increased temperatures result from heat produced by the microorganisms as they degrade the organic material in the waste. (globalsecurity.org)
- others can help soil microorganisms by creating a friendlier habitat or providing nutrients. (scirp.org)
- Based on the WLAs and the permitted flow, all four plants are required to meet an average total nitrogen concentration of less than 4 mg/L. (environmental-expert.com)
- Function and transformation of nitrogen in higher Plants. (worldcat.org)
- Nutrient balance and nitrogen use nitrogen toxicity in plants. (worldcat.org)
- Diagnosis of nitrogen deficiency in plants. (worldcat.org)
- Nitrogen nutrition of plants and insect invasion. (worldcat.org)
- Technological approaches to improving the efficiency of nitrogen fertilizer use by crop plants. (worldcat.org)
- Agricultural runoff, livestock operations, aquaculture, industry (e.g., food processing facilities and pulp and paper mills), sewage treatment plants, and fossil fuel combustion are the major sources of nutrient pollution [ 1 ]. (hindawi.com)
- Nitrogen is arguably the most important nutrient required by plants. (wiley.com)
- It is carried out by prokaryotes using an enzyme complex called nitrogenase and results in atmospheric N2 being reduced into a form of nitrogen diazotrophic organisms and plants are able to use (ammonia). (wiley.com)
- Under the right conditions, including abundant nutrients, algae and aquatic plants will continue to grow and multiply well beyond the amount needed to support the food web. (encyclopedia.com)
- Wastewater (or sewage) treatment plants are point sources of nutrients by virtue of the effluent which they discharge directly to rivers and streams. (encyclopedia.com)
- Tertiary treatment is expensive, and requires new systems, so some plants spread their effluent on land during times when nutrients could cause water quality problems. (encyclopedia.com)
- Microbial inoculants are environmental-friendly and deliver plant nutrients to plants in a more sustainable manner. (frontiersin.org)
- Other facilities use treated effluent for irrigation, so the nutrients in the effluent can be used by plants, reducing the amount of supplemental fertilizer addition. (waterworld.com)
- Through consumption, digestion, and excretion of soil organic matter, soil arthropods help improve soil structure and change nutrients into forms available to plants. (nps.gov)
- Unexpectedly, Plant 3, the plant fed with nitrogen plus solution and inoculum - which was originally speculated to grow the best out of the four - developed at a more declining rate and had the most number of dead seedlings in the end than the plants in the other three pots. (brightkite.com)
- Aside from the information gathered for Plant 3 and Plant 4, we also collected data that Plant 2, nitrogen minus solution with inoculum, grew slightly larger than Plant 1, nitrogen minus solution with no inoculum.Introduction:As with the great majority of many other organisms, plants make use of Nitrogen (N) as one of the primary sources of nutrients in order to grow and produce energy. (brightkite.com)
- Formally occurring in the surrounding ecosystem, nitrogen is naturally reduced to form a variety of other biological molecules that can be utilized in the development of photosynthetic plants. (brightkite.com)
- Insufficient levels of available soil nitrogen limit microbial growth and decay and growth of the plants themselves. (brightkite.com)
- Combined with Parkson's DynaSand filtration, systems are available to meet the most stringent effluent quality requirements with plants achieving less than 3.0 mg/l total nitrogen and 0.03 mg/l phosphorus. (parkson.com)
- Once the organic matter breaks down, excess nutrients such as N, P and S (Sulfur) are released into the soil and become available to the plants ( Figure 1 ). (scirp.org)
- This paper will describe research conducted to evaluate the feasibility of Biological Nutrient Removal (BNR) technology, specifically an upflow biological anoxic filter (BAF) configured to provide enhanced solids capture for use in denitrification (DN) applications to meet a TN discharge limit of 3 mg/L. (environmental-expert.com)
- IKUMI, DS y EKAMA, GA . The removal of N and P in aerobic and anoxic-aerobic digestion of waste activated sludge from biological nutrient removal systems . (scielo.org.za)
- Biological Nutrient Removal: The removal of nutrients such as nitrogen and/or phosphorous through an activated sludge system. (amwater.com)
- For instance, wastewater from the optoelectronics industry is rich in organic nitrogen because ethanolamine and tetramethyl ammonium hydroxide are used in the manufacturing process [ 5 ]. (hindawi.com)
- While particulate organic carbon (POC), particulate organic nitrogen (PON), and dissolved organic carbon (DOC) accumulated in the surface waters from January to May, the dissolved organic nitrogen (DON)-pool decreased substantially (Δ - 50 μg N L -1 ). (frontiersin.org)
- A meta-analysis of the response of soil respiration, net nitrogen mineralization, and aboveground plant growth to experimental ecosystem warming. (nih.gov)
- Soil degradation in coffee ( Coffea arabica L.) occurs due to soil acidification, e.g., by the use of fertilizer-N, due to soil erosion, nutrient depletion by leaching, runoff, organic matter mineralization, and unsubstituted crop removal (Pavan et al. (scielo.br)
- Conventional nitrogen fertilizers. (worldcat.org)
- Slow-Release nitrogen fertilizers. (worldcat.org)
- To compensate , modern agriculture has been highly reliant on industrial nitrogen fertilizers to achieve maximum crop productivity. (wiley.com)
- SOIL: Add 1 gallon of Mayan MicroZyme fermented mixture (step 1) to every 30 gallons in nutrient reservoir OR undiluted fermented mixture can be sprayed directly on the soil surface immediately preceding irrigation with fertilizers. (horticulturesource.com)
- Conversely, the report noted, "Fertilizers can be energy-intensive to manufacture, and the supply of some nutrients, such as phosphorus, is limited. (waterworld.com)
- Liming effects on nitrogen use and efficiency. (worldcat.org)
- Efficiency of fertilizer nitrogen use as related to aplication methods. (worldcat.org)
- Using a library of more than 10,000 deep-sea corals collected by Caltech's Jess Adkins , an international team of scientists has shown that periods of colder climates are associated with higher phytoplankton efficiency and a reduction in nutrients in the surface of the Southern Ocean (the ocean surrounding the Antarctic), which is related to an increase in carbon sequestration in the deep ocean. (caltech.edu)
- In most parts of the modern ocean, phytoplankton deplete all of the available nutrients in the surface ocean, and the biological pump operates at maximum efficiency. (caltech.edu)
- To track the efficiency of the biological pump over the span of the past 40,000 years, Adkins and his colleagues collected more than 10,000 fossils of the coral Desmophyllum dianthus . (caltech.edu)
- New regulations aiming to reduce total pollutant loads entering receiving waters are emphasizing more stringent nutrient discharge limits for wastewater treatment plant (WWTP) effluents. (environmental-expert.com)
- apling nitrogen in irrigation waters. (worldcat.org)
- a 50 per cent reduction of nitrogen loading to surface waters, no pesticides in drinking water, etc.), and the purpose of monitoring is to supply data and information on the water quality in relation to these regulatory actions. (europa.eu)
- The worldwide increase in red tides and other blooms of toxic algae in coastal ocean waters has been linked to nutrient enrichment coming from coastal rivers. (encyclopedia.com)
- Nutrients are present naturally in lakes and streams, but human activity has greatly increased the amounts going into surface waters. (encyclopedia.com)
- However, in the modern Southern Ocean, there is a limited amount of iron-which means that there are not enough phytoplankton to fully consume the nitrogen and phosphorus in the surface waters. (caltech.edu)
- It is well known that microbes, plankton, and fish recycle nutrients in ocean waters, but whales and other marine mammals have largely been ignored in this cycle. (redorbit.com)
- The objective of water quality monitoring is to obtain quantitative information on the physical, chemical, and biological characteristics of water via statistical sampling (Sanders et al. (europa.eu)
- Nutrients are chemical elements critical to the development of plant and animal life. (encyclopedia.com)
- Depending on the source, some wastewater can contain nutrient or sediment pollution, or dissolved chemical contaminants . (chesapeakebay.net)
- Conversions and transformations of nutrients in the environment result from chemical reactions, biological activity, or both. (earthsciweek.org)
- Mycologists are also employed in the private sector by companies that develop chemical and biological control products or new agricultural products, and by companies that provide disease control services. (oercommons.org)
- This authoritative guide addresses these issues from both a biological and chemical perspective and offers a focused resource for nutrient removal fundamentals, modeling, and troubleshooting. (accessengineeringlibrary.com)
- Ideally, a fingerprint of the biological effects should complement the chemical fingerprint. (scoop.it)
- The nitrogen cycle is one of the Earth's biogeochemical cycle that involves the conversion of nitrogen into different chemical forms. (wikipedia.org)
- Phytoplankton rely on fixed nitrogen to photosynthesize and grow, in turn feeding the entire ecosystem. (princeton.edu)
- Without the wind there would be no upwelling, without the upwelling there would be no abundance of nutrients, and without the growth of phytoplankton from the nutrients there would be no fisheries. (reefkeeping.com)
- There, phytoplankton, the base of the food chain, has a brake on its productivity when nitrogen is used up in the otherwise productive summer months. (redorbit.com)
- And everything that we do to enhance recovery and restoration of the great whales to something like pre-harvest levels works against other deleterious effects that humans are causing in the oceans," says McCarthy, like the decline of overall ocean productivity as climate change drives up water temperatures, which, in turn, causes a decline in nutrients for phytoplankton. (redorbit.com)
- A Master of Science degree in an appropriate agricultural, environmental, biological, or physical science. (uvm.edu)
- Use of nitrogen from agricultural, indistrial, and municipal wastes. (worldcat.org)
- With strong knowledge on soil agronomic management practices and the role of nutrient management in a range of agricultural systems. (wur.nl)
- Agricultural runoff - surplus water from agricultural land, often draining into rivers and then into the sea, and often enriched with nutrients, sediment, and agricultural chemicals. (wikipedia.org)
- Agricultural chemicals include fertilisers (nitrogen and phosphorus) and biocides (herbicides, fungicides and insecticides). (mdpi.com)
- With its patented "Advanced Biological Nutrient Recovery" (ABNR™) process, the company has been offering innovative biological wastewater treatment technology for industrial, municipal and agricultural customers since 2011. (schott.com)
- Excess nutrients not only affect stream health but also may impact human health and livestock. (encyclopedia.com)
- To safely and effectively treat this wastewater-and to reduce the amount of excess nutrients polluting the Bay and its tributaries-hundreds of treatment facilities throughout the Chesapeake Bay region are being upgraded with advanced technology. (chesapeakebay.net)
- Excess nutrients-in particular, nitrogen and phosphorus-which can fuel the growth of algae blooms that create low-oxygen "dead zones" that suffocate marine life. (chesapeakebay.net)
- The principle is that ABNR™ technology reliably gains back excess nutrients and other pollutants from wastewaters by using a special flow process involving algae and other existing biological organisms. (schott.com)
- Algal bloom - a rapid excessive growth of algae, generally caused by high nutrient levels, particularly phosphorus. (wikipedia.org)
- One approach to reduce pollutants is using algae and other biological organisms. (schott.com)
- During the first phase, contaminated wastewater and carbon dioxide (CO2) are mixed with a composition of algae and other existing biological organisms in a mixing vessel. (schott.com)
- Ettershank G, Ettershank JA, Bryant M, Whitford WG (1978) Effects of nitrogen fertilization on primary production in a Chihuahuan Desert ecosystem. (springer.com)
- By utilizing spatiotemporal biological parameterizations, the adjoint variational method was applied to a 3D marine ecosystem dynamical model. (hindawi.com)
- This session is designed to bring together scientists, aquatic resource managers, policymakers, and other stakeholders to evaluate progress in developing DNA-based methods and indicators for aquatic ecosystem monitoring and biological condition assessment, and to explore possibilities for wider implementation and utilization of these tools in monitoring programs. (nalms.org)
- The Next-Generation Ecosystem Experiments (NGEE Arctic) project is supported by the Office of Biological and Environmental Research in the DOE Office of Science. (ornl.gov)
- The Terrestrial Ecosystem Science program is sponsored by the Climate and Environmental Sciences Division of the U.S. Department of Energy's Office of Biological and Environmental Research . (ornl.gov)
- They are responsible for soil formation, ecosystem biogeochemistry, cycling of nutrients and degradation of plant residues and xenobiotics. (scirp.org)
- The nutrient cycle is considered to be a critical ecosystem function essential to life. (scirp.org)
- The book contains chapters on organic manures (including green manures), recycling of organic wastes, vermiculture, biofertilizers, organic methods of pest and weed management, integrated nutrient management, farming systems and case studies of organic farming. (abebooks.com)
- Integrated Nutrient Management towards Sustainable Agriculture 11. (abebooks.com)
- In addition, embedded in wastewater are two to four times the energy needed to treat it, as well as macronutrients such as nitrogen and phosphorus. (waterworld.com)
- Micronutrients are the nutrients that are required in smaller quantities, while macronutrients are the essential nutrients that are required in much greater quantities (Bonner, Varner 1965). (brightkite.com)
- As one of the macronutrients, nitrogen plays an important role in plant growth. (wikipedia.org)
- Water quality issues in the Sound have led to the assignment of nitrogen waste load allocations (WLAs) by the Environmental Protection Agency (EPA) to communities surrounding the Sound. (environmental-expert.com)
- As the rice grows above the water surface, it shades out the fern, which dies, releasing the stored nitrogen. (encyclopedia.com)
- Nitrogen or water stress: their interrelationships. (worldcat.org)
- When considering the water quality of lakes and streams, two important questions come to mind: "What are nutrients? (encyclopedia.com)
- in contrast, the nutrients can be carried away in moving water. (encyclopedia.com)
- Septic systems may contribute large amounts of nutrients, particularly if located close to the water. (encyclopedia.com)
- As water resource recovery facilities (WRRFs) continue to face nutrient management challenges, there is a need for guidance on the wide range of nutrient control techniques. (waterrf.org)
- Using PCR primers designed to specifically target archaeal amoA , we find AOA to be pervasive in areas of the ocean that are critical for the global nitrogen cycle, including the base of the euphotic zone, suboxic water columns, and estuarine and coastal sediments. (pnas.org)
- Two reasons: first, as it grows, coral accretes a skeleton around itself, precipitating calcium carbonate (CaCO 3 ) and other trace elements (including nitrogen) out of the water around it. (caltech.edu)
- Recently, the Water Environment Federation, Environmental Defense Fund and Johnston Foundation at Wingspread began working together to create a roadmap to implement a nutrient management vision, primarily for nitrogen and phosphorus. (waterworld.com)
- The partnership's 25-year goal is developing a "Nutrient Roadmap" to achieve smarter nutrient removal and recovery at water resource recovery facilities. (waterworld.com)
- As such, the report indicated that the partnership's "aspirational goal, or 25-year challenge, is informing the development of a Nutrient Roadmap, which will serve a short-term need for achieving smarter nutrient removal and recovery at water resource recovery facilities (WRRFs). (waterworld.com)
- Addressing key challenges and sharing practical experience for dealing with comparability of biological data across a variety of water body types and taxonomic groups. (nalms.org)
- The water is treated by removing the methanol via biological digestion in a bioreactor, separating a majority of the contaminants from the water by reverse osmosis and removing the boron that passes through the reverse osmosis system with a boron-removing ion exchange resin. (google.com)
- Upwelling of deep oceanic water results in a high availability of nitrogen and phosphorus. (reefkeeping.com)
- Sponge filters can help combat nutrient levels in the water. (mypets.net.au)
- In their world water report 2017, the United Nations even refer to it as resource providing clean water, energy, nutrients and other useful by-products for the reutilization. (schott.com)
- Some cover crops fix nitrogen but many more require nitrogen to grow. (gov.on.ca)
- Grass cover crops like rye and Brassicas like oilseed radish are excellent scavengers of nitrogen left behind by the main crop or from manure applications. (gov.on.ca)
- Nitrogen ' catch crops ' are used to prevent winter injury to perennial crops such as grapes and fruit trees. (gov.on.ca)
- Cover crops such as rye seeded in late summer and early fall take up the excess nitrogen preventing the perennial crop from continuing vegetative growth and encouraging hardening off for the winter. (gov.on.ca)
- The researchers also reported that their observed measurements are lower than those predicted by atmospheric chemistry models, offering the possibility that improved combustion technology and the adoption of renewable energy sources in the region may be able to curb the nitrogen contamination before it influences open ocean biology significantly. (princeton.edu)
- In addition the lecturer will support the education portfolio of the Soil Biology Group by contributing to thesis projects on the topic of nutrient management. (wur.nl)
- It is a hands-on guide to understanding the biology and biological conditions that occur at each treatment unit. (google.it)
- Originally cross-trained in oceanography, quantitative population biology, and ecology at University of California, Sydeman now works on physical-biological interactions on a variety of taxa from seabirds and marine mammals to krill and forage fish. (pices.int)
- Such new regulations pose a challenging task for existing WWTPs, which have not generally been designed to address such low nutrient discharge limits. (environmental-expert.com)
- Well-designed nutrient trading programs can provide cost-effective solutions for treatment facilities that need to meet stricter nutrient limits. (chesapeakebay.net)
- Trees and other vegetation absorb pollutants such as excessive nitrogen dioxide, ozone and particulate matter, through their leaves and needles and thereby help to improve air quality. (unece.org)
- But the real threat of autos was to society en masse - the accumulated exposure to their minute pollutants and ability to kill others at high speeds, not to mention the disruptions of suburbs, and long commutes - all second order effects. (kk.org)
- The aim of this investigation was to determine the effect of air supplied at different rates, namely, 0, 0.3, 1.0 and 2.0 m 3 ·h -1 N, on the biological filtration process. (scielo.org.za)
- These filters are mechanical and biological, and are best suited to aquariums with low filtration needs. (mypets.net.au)