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Definition
| The process by which an organism takes in and makes use of food substances |
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| The remains of dead organisms and other organic matter. - forms topsoil. |
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Definition
| The topsoil and other distinct soil layers. |
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| Topsoil that support abundant growht formed by roughly equal amounts of sand, silt, and clay. |
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| When mineral cations are displaced from soil particles by other cations and enter the soil solution to be absorbed by root hairs. |
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| A commitment embracing a variety of farming methods that are conservation minded, environmentally safe, and profitable. |
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Definition
| The addition of mineral nutrients to the soil. |
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| When a plow creates a narrow furrow for seeds and fertilizer, keeping roots intact. |
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| A non-destructive biotechnology that harnesses some plants' ability to extract soil pollutants. |
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Definition
| An element required for a plant to complete it's life cycle and reproduce. |
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| A method used to determine essential elements, in which plants are grown in mineral solution. |
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Definition
| Nutrients plants require in large proportions (there are 9) |
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Definition
| Nutrients plants need in small quantities. (there are 8) |
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Definition
| The soil layer that is bound to the plant's roots. |
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Definition
| Soil bacteria with especially large populations in the rhizosphere. |
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Definition
| Describes transformations of nitrogen and nitrogenous compounds in to forms able to be absorbed by plants. |
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Definition
| A process through which prokaryotes and some other bacteria produce NH3 and N2. |
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Definition
| Swellings in the legumes' roots composed of plant cells that have been "infected" by rhizobacteria. |
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Definition
| Bacteria within the nodule, contained within vesicles formed by the root cells. |
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Definition
| Non-legumes are planted, then the following year a legume is planted to restore nitrogen. |
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Definition
| Mutualistic associations with roots a fungi. |
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Definition
| Where the mycelium forms a dense sheath, or mantle over the surface of the root. |
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Definition
| An association when the soil hyphae grow along the root. |
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Definition
| A plant that nourishes itself, but grows on another plant; usually trunks or branches. |
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