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Earth Science 12.4
Soil as a Resource
8
Science
12th Grade
01/22/2012

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Term
soil fertility
Definition
The ability of soil to grow plants.
Term
soil depletion
Definition
The process by which soil gradually becomes so lacking or depleted in nutrients that it can no longer grow a crop.
Term
salinization
Definition
A soil condition caused by the evaporation of irrigation water, which leaves too much mineral matter on the soil's surface for crops to grow.
Term
windbreaks/shelterbelts
Definition
Belts of trees planted along the edges of fields that slow the wind and reduce wind erosion.
Term
contour farming
Definition
A method that inhibits water from flowing rapidly downhill and carrying soil with it by planting crops in rows parallel to land contours.
Term
terraces
Definition
Flatten a slope and slow the speed of runoff; as a result, water can transport less topsoil.
Term
strip cropping
Definition
Alternating a crop that leaves bare ground between rows with a crop that completely covers the ground.
Term
no-till
Definition
A method in which plowing, planting, fertilizing, and weed control are all done at the same time.
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