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the mixture of disintegrated organic matter |
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the base geological material in a particular location |
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the mass of solid rock that makes up the earths crust |
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the physical and chemical processes that break down rocks and minerals into smaller particles |
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accross-section of all the soil horizons in a specific soil |
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soil that is approximitly equal parts, sand, clay,and silt) |
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the deterioration of those characteristics of soil needed for plant growth or other ecosystem services |
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allowing animals to eat so much of the plant cover in a field or pasture that the plants cannot regrow |
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a loss of more than percent in the productivity of soil due to erosion, deforestation, overgrazing, drought, or other factors |
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using a source other than precipitation to water crops |
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the build up of salts in the surface layers of soil |
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chemicals used to kill organisms that attack or compete with plants that humans value |
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a type of farming that relies on human and animal power along with hand tools and nonmotorized machines |
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the amount of a crop produced in a given area |
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a type of farming that relies on technology and chemicals to increase yields and reduce costs |
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the intro of new technologies, crop varieties, and farming practices to the developing world |
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the use of organisms to battle pests and weeds |
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integrated pest management |
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the use of both biological and chemical methods to control safely and economically |
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an insect or animal that transfers pollen from one plant to another |
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