The prevention of growth and or spread of unwanted plants.

A plant growing in a location where it is not wanted, often competing with cultivated plants.

Diminished or failed response of PLANTS to HERBICIDES.

Pesticides used to destroy unwanted vegetation, especially various types of weeds, grasses (POACEAE), and woody plants. Some plants develop HERBICIDE RESISTANCE.

A plant genus of the family EUPHORBIACEAE, order Euphorbiales, subclass Rosidae. Commercial natural RUBBER is mainly obtained from Hevea brasiliensis but also from some other plants.

The science, art or practice of cultivating soil, producing crops, and raising livestock.

A plant species in the CHENOPODIUM genus known for edible greens.

Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)

A plant genus in the CHENOPODIACEAE family.

The presence of bacteria, viruses, and fungi in the soil. This term is not restricted to pathogenic organisms.