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Soil
Soil 6 E 2.3, 2.4
Question | Answer |
---|---|
soil | a mixture of weathered rock, organic matter, water, and air |
humus | the organic part of the soil, formed when dead plants and animals decay. |
leaching | removal of nutrients from soil due to rain or irrigation |
soil permeability | how long it takes water to drain through soil |
crop roatation | when farmers plant different crops in different fields each year in order to use less nutrients from the soil |
terracing | making steps in the sides of hills or mountains to help control soil erosion. |
weathering | the breaking down of rocks usually by wind or water. |
soil horizon | a layer of soil with properties different from the layers above and below it |