Soil phosphorus depletion and shifts in plant communities change bacterial community structure in a long-term grassland...
Agricultural systems rely on healthy soils and their sustainability requires understanding the long-term impacts of agricultural practices on soils, including microbial communities. We examined the impact of 17 years of land management on soil bacterial communities in a New Zealand randomized-block pasture trial. Significant variation in bacterial community structure related to mowing and plant biomass removal, while nitrogen fertilizer had no effect. Changes in soil chemistry and legume abundance described 52% of the observed variation in the bacterial community structure. Legumes (Trifolium species) were absent in unmanaged plots but increased in abundance with management intensity; 11% of the variation in soil bacterial community structure was attributed to this shift in the plant community. Olsen P explained 10% of the observed heterogeneity, which is likely due to persistent biomass removal resulting in P limitation; ...http://onlinelibrary.wiley.com/doi/10.1111/1758-2229.12049/full?globalMessage=0
Land use and soil organic matter in South Africa 2: a review on the influence of arable crop production
Introduction. The decline of soil organic matter as a result of agricultural land use was identified for review, with the ultimate aim of developing a soil protection strategy and policy for South Africa. Organic matter is of great importance in soil, because it impacts on the physical, chemical and biological properties of soils. Physically, it promotes aggregate stability and therefore water infiltration, percolation and retention. It impacts on soil chemistry by increasing cation exchange capacity, soil buffer capacity and nutrient supply. Biologically, it stimulates the activity and diversity of organisms in soil.1. The organic matter content of soils is determined mainly by climate (rainfall and temperature), vegetation cover and, to a lesser extent, by topography, parent material and time. Changes in land use, however, can significantly impact on the organic matter ...http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0038-23532011000300010&lng=pt&nrm=iso
Spectrum Laboratories : Chemical Fact Sheet - Cas # 470906 CASRN 470-90-6
CHLORFENVINPHOS WAS APPLIED TO SLOPING ARABLE LAND AT THE RATE OF 22 KG ACTIVE INGREDIENT/HECTARE. ONLY SMALL QUANTITIES APPEARED AT BOTTOM OF SLOPE. NO RESIDUES WERE DETECTED IN A POND AT BOTTOM OF SLOPE AT 23 WEEKS AFTER APPLICATION. TERRESTRIAL FATE: Biodegradation appears to be the dominant degradation process in soil. The importance of microbial degradation has been demonstrated by various persistence studies that compare degradation rates in sterile versus nonsterile soil(1-3); in these studies, degradation of chlorfenviphos is much faster in nonsterile soil than in sterile soil(1-3). One measured Koc value of 295 suggests medium soil mobility; however, chlorfenviphos can be adsorbed strongly by clay particles , and the results of one field study in a sandy loam soil indicated that chlorfenviphos did not leach(6). Chlorfenviphos applied to plant surfaces has been observed to volatilize(7); therefore, ...http://www.speclab.com/compound/c470906.htm
The Dish on Dirt: Why Soil Matters to Tree Health | 3BL Media
Soils can vary on the same property. An easy way to identify your soil type is to fill a small jar with soil from your yard, shake it, and let the soil settle overnight. The following day you should notice distinct soil layers. Sandy soil tends to settle at the bottom, clay at the top, and silt in the middle.. Why Does Soil Matter?. Soil performs five essential functions; using the wrong type of soil or unhealthy soil can impede tree health by constricting roots from accessing the water and nutrients necessary. Soil helps regulate water, supports biodiversity, filters pollutants, provides physical support, and cycles nutrients. You can understand why attempting to plant a tree that requires less soil saturation may not thrive if it's planted in silt or clay soil. Trees show signs of stress, ...http://3blmedia.com/News/Dish-Dirt-Why-Soil-Matters-Tree-Health
Sinharaja Vergin Rain Forest:Soils and Soil Microflora -Mysrilanka.com
While the mineral constituents of soil arise largely from parent material and bed rock, organic substances originate from the living matter above ground. Analysis of soil nutrient content in surface soils at the Sinharaja has shown greater concentration of exchangeable cations in the upper layers probably due to increased activity of soil micro-organisms as well as continuous enrichment by litter. Nutrient analysis of litter in the Sinharaja shows that nutrients from decaying plant matter are released in the order of potassium, magnesium, calcium, phosphorus and nitrogen. Some studies on soil nitrogen fixation shows that the activity is highest in surface soils upto 10.5 centimeters, while fixation in leaf and twig litter is considerably less.. Not surprisingly rain forest trees have a well-developed surface root system, and are highly efficient in nutrient absorption, and even under high rainfall ...http://www.mysrilanka.com/travel/sinharaja/soil.html
Soil sequestration | Corporate Knights
First and foremost, we need to disturb soil less. The advent of no-till and reduced tillage methods have allowed us to increase the carbon content of soils.. No-till and direct-seeding methods place the seed directly into the soil, minimizing the disturbance associated with seedbed preparation. The lack of disturbance allows the roots and crop residues from the previous crops to form soil organic matter. It reduces the degradation of the soil organic matter already present in the soil.. In Canada, we are already benefiting from reduced tillage. In the Prairies, no-tillage agriculture has increased from less than five per cent of the land area in the early 1990s to almost 50 per cent in 2006.. The situation is a bit more complex in Eastern Canada. The region's soil type and climate make it less easy to build soil organic matter. At Dalhousie's Atlantic Soil ...http://www.corporateknights.com/channels/workplace/soil-sequestration-15119316/
Effects of heavy metal pollution on the soil microbial activity on Environmental XPRT
Article Effects of heavy metal pollution on the soil microbial activity. The effects of heavy metals on soil microbial processes were investigated over a period of six weeks. Analytical grade (Sigma) sulphate salts of copper, zinc and nickel were add...https://www.environmental-expert.com/articles/effects-of-heavy-metal-pollution-on-the-soil-microbial-activity-38676
Response and resilience of soil microbial communities inhabiting in edible oil stress/contamination from industrial estates |...
Novel technologies continue to expand our understanding of microbial diversity and community structure. Metagenomic analysis [10, 45] has previously identified 'unexpectedly' high bacterial phylogenetic and functional diversity. The long-term sustainability of soil contamination requires detailed knowledge of its biodiversity coupled to profound understanding for its functioning. Previous studies with 16S rRNA-based analyses using clone libraries [46-48], microarrays (for example, PhyloChip and GeoChip) [49-52], pyrosequencing [7, 53] and other approaches  showed that soil microbial communities are highly diverse and complex.. Here, we took opportunity to explore microbial diversity and its functioning in edible oil contaminated soil using 16S rRNA shotgun sequencing approach. This study provides a comprehensive survey of the microbial richness and composition of long-term oil contaminated soil microbial communities. Upon taxonomic ...https://bmcmicrobiol.biomedcentral.com/articles/10.1186/s12866-016-0669-8
Functionality of microbiome in the soil system - Center for Sustaining Agriculture and Natural Resources | Science in Action to...
As a PhD student in the Department of Plant Pathology, I recently attended the Tilth Conference in Wenatchee, which provided me the opportunity to hear great presentations and spark my thinking on the topic of microbiomes. I am currently working on Brassica seed meal amendments for suppressing apple replant disease under the supervision of Dr. Mark Mazzola. Several presentations, including one by Dr. Mazzola, were inspiring to me at the conference.. "Soil is the living thin skin of our planet," said Dr. David Granatstein in his presentation. Farmers care a lot about their soils and they are eager to figure out what factors contribute to a healthy soil. It is not an easy question since there is not a single model that fits everything. Soil health can be related to several factors, such as disease suppression, plant access to the water and access to nutrients. Carbon and organic matter are also important elements in the soil ...http://csanr.wsu.edu/functionality-of-microbiome-in-the-soil-system/
IMB :: Laboratory of Soil Microbiology
The research results in recent years have shown an essential microbiological degradation of soils exposed to convenctional agricultural technologies. It was shown that the pedo-microbiological degradation of arable soils is much more advanced compared with humus degradation; the pedo-microbiological parameters were found to be more sensitive (comparing to the soil organic matter content) and, consequently, could be used for tracing and assessing the ecological changes in soil on relatively early stage. Quality and quantity pedo-microbiological criteria were suggested for estimation, monitoring and prediction of arable soil quality.. ...http://imb.asm.md/index6-0-0-0-en.htm
An improved method for measuring soil microbial activity by gas phase flow injection analysis - pdf download
An improved method for measuring soil microbial activity by gas phase flow injection analysis . Alek Zander ;Revista Brasileira de Ciência do Solo 2012, 36 2. Download books free in pdf. Online library with books, university works and thousands of documents available to read online and download.http://books.duhnnae.com/2017/jun8/149837982911-An-improved-method-for-measuring-soil-microbial-activity-by-gas-phase-flow-injection-analysis.php
Cattle trampling alters soil properties and changes soil microbial communities in a Swiss sub-alpine pasture - Zurich Open...
Stock farming plays an important role in the agriculture of alpine regions although deleterious effects on the soils are most pronounced here. We investigated the effects of cattle trampling on soil physical, chemical and microbial properties in a Swiss sub-alpine pasture. About 10% of the study site was bare of vegetation as a result of repeated cattle trampling and the bulk density of these bare steps was 20% higher than of the soils unaffected by trampling. In the upper 25 cm, soil organic carbon (SOC) concentrations and total SOC stocks were 35% and 20% respectively lower than on the vegetated slope. As compared with the vegetated slope, topsoils of the bare steps featured narrower C:N-ratios and were more enriched in the 15N isotope, with typical values of deeper soil layers. This indicates that bare soils primarily evolved by erosion and not by a compaction, which ...http://www.zora.uzh.ch/id/eprint/70983/
Publication : USDA ARS
Citation: Mazzola, M., Muramoto, J., Shennan, C. 2012. Transformation of soil microbial community structure in response to anaerobic soil disinfestation for soil-borne disease control in strawberry. Phytopathology. 102:S4.77-78. Interpretive Summary: Technical Abstract: Anaerobic soil disinfestation (ASD) has been used to control soil-borne pathogens and nematodes in various plant production systems including strawberries. Disease control is commonly attributed to the depletion of oxygen and the generation of toxic compounds, including organic acids and volatiles. However, recent evidence suggests that disease control, in part, may be dependent upon specific changes in soil biology that are induced by ASD. Although reported to control disease by depressing targeted microbial populations, ASD and ASD in conjunction with Brassicaceae seed meal or fish emulsion applications increased total bacterial, total ...https://www.ars.usda.gov/research/publications/publication/?seqNo115=278971
"Detection in Soil of a Deletion in an Engineered DNA Sequence by Using" by Janet K. Jansson, William E. Holben et al.
Two Pseudomonas strains were engineered to contain the nptII gene and plasmid vector sequences in their chromosomes. After incubation of these strains in nonsterile soil, total bacterial DNA was isolated and analyzed by Southern blot hybridization with the nptII gene and the plasmid vector as probes. In addition to the expected bands of hybridization, a new band corresponding to the loss of vector sequences from the chromosome while retaining the nptII gene was observed for one of the strains. The more stressful conditions encountered in soil appeared to increase the frequency of loss of the vector sequences from this strain.http://scholarworks.umt.edu/biosci_pubs/26/
Afro Scientress - a science blog: Micro-organisms munching on antibiotics
Methods: The researchers examined 18 different antibiotics ranging from natural, semi-synthetic to synthetic which could target a wide range of bacterial families and included ciprofloxacin, penicillin and kanamycin which are some of the more commonly prescribed antibiotics in medicine. Seventy-five bacterial samples were isolated from 11 diverse soil samples ranging from farm soil (cornfields fertilised with manure from cows fed with antibiotics), urban soil and pristine soil (untouched forest areas). This method ensured that the bacteria were isolated from areas with varying degrees of exposure to human-made antibiotics. More than half of the samples included bacteria from the phylogenetic order of Burkholderiales and Pseudomonadales, both capable of inflicting disease in humans. Two antibiotic concentrations (20 mg/L and 1 g/L) were tested with one concentration (1 g/L) being 50 times greater than standard antibiotic resistance ...http://scientress.blogspot.com/2008/04/micro-organisms-munching-on-antibiotics.html
What you should know about the garden soil | Hort Zone
The quality of your garden soil will contribute 50% to the success of your gardening business. Don't overlook it's importance. Find out all you need to knowhttps://www.hortzone.com/blog/2016/01/15/what-you-should-know-about-the-garden-soil/?replytocom=222
Nonomuraea terrinatasp. nov., a novel soil actinomycete | SpringerLink
The taxonomic position of a soil isolate, strain E626, was evaluated using the polyphasic approach. The organism was found to have chemical and morphological features consistent with its assignment tohttps://link.springer.com/article/10.1023%2FA%3A1024474719786
buy 1257-08-5 | Application of Computational Methods for the Design of BACE-1 Inhibitors
Dirt microorganisms play key tasks in ecosystem functioning and are known to be influenced by biotic and abiotic factors, such as flower cover or edaphic guidelines. large proportion of Ascomycota phylum (fungi), mostly in non-rainforest formations, and Planctomycetes phylum (bacteria) in all formations were observed. Interestingly, such patterns could be indicators of past disturbances that occurred on different time scales. Furthermore, the bacteria and fungi were affected by varied edaphic parameters as well as from the interplay between these two soil areas. Another striking getting was the living of a site effect. Variations in microbial areas between geographical locations may be explained by dispersal limitation in the context of the biogeographical island theory. In conclusion, each plant formation at each site possesses is certainly very own microbial community caused by multiple connections between abiotic and biotic elements. Introduction Garden ...http://world-of-links.com/tag/buy-1257-08-5/
PKX1 | Application of Computational Methods for the Design of BACE-1 Inhibitors
Dirt microorganisms play key tasks in ecosystem functioning and are known to be influenced by biotic and abiotic factors, such as flower cover or edaphic guidelines. large proportion of Ascomycota phylum (fungi), mostly in non-rainforest formations, and Planctomycetes phylum (bacteria) in all formations were observed. Interestingly, such patterns could be indicators of past disturbances that occurred on different time scales. Furthermore, the bacteria and fungi were affected by varied edaphic parameters as well as from the interplay between these two soil areas. Another striking getting was the living of a site effect. Variations in microbial areas between geographical locations may be explained by dispersal limitation in the context of the biogeographical island theory. In conclusion, each plant formation at each site possesses is certainly very own microbial community caused by multiple connections between abiotic and biotic elements. Introduction Garden ...http://world-of-links.com/tag/pkx1/
9780125138406: Methods in Applied Soil Microbiology and Biochemistry - IberLibro: 0125138407
Methods in Applied Soil Microbiology and Biochemistry en Iberlibro.com - ISBN 10: 0125138407 - ISBN 13: 9780125138406 - Academic Press - 1995 - Tapa durahttps://www.iberlibro.com/9780125138406/Methods-Applied-Soil-Microbiology-Biochemistry-0125138407/plp
Tenuibacillus halotolerans sp. nov., a novel bacterium isolated from a soil sample from a salt lake in Xinjiang, China and...
Sigma-Aldrich offers abstracts and full-text articles by [Xu-Hong Gao, Sheng Gao, Yu Zhou, Hui-Lin Guan, Yun-Jiao Zhang, Man Jia, Hua-Wei Huang, Dong-Xu Yang, Wen-Jun Li, Shu-Kun Tang].https://www.sigmaaldrich.com/catalog/papers/22941247
Bioline International Official Site (site up-dated regularly)
also a known degrader of PAHs, however, was lower. Weighted and unweighted PCoA with UniFrac indicated that phylotypes were similar in the different treatments at day 0, but changed at day 1. After 14 days, phylotypes in the unamended and acetone-amended soil were similar, but different from those in the anthracene-spiked soil ...http://www.bioline.org.br/abstract?id=ej13056&lang=en
Home Orchard Society Forums - View topic - Cool video about soil microbiology
It's also available on Vimeo, but not on you tube. The guy's named Doug Weatherbee. Why is it not on You tube? , I don't know. I hope you like it ...http://www.homeorchardsociety.org/forums/viewtopic.php?f=1&t=8589&p=16793
You and your children will learn the basic principles of composting, build a compost container, and maintain the compost pile for a home-grown supply of free, organic compost to enrich your garden soil.http://www.flourishonline.org/2010/02/composting-101-learning-about-gods-original-recycling-system/
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