Soil conservation is the practice of protecting the quality and integrity of soil by reducing soil erosion, preventing soil degradation, and improving soil fertility. It involves the use of various techniques such as crop rotation, cover crops, terracing, contour plowing, and the use of organic matter to
From Wikipedia
Soil conservation is the prevention of loss of the topmost layer of the soil from erosion or prevention of reduced fertility caused by over usage, acidification, salinization or other chemical soil contamination.