What Is Soil Conservation,https://goo.gl/r1938O Soil conservation Soil conservation is the prevention of soil from erosion or reduced fertility caused by overuse, acidification, salinization or other chemical soil contamination. Slash-and-burn and other unsustainable methods of subsistence farming are practiced in some lesser developed areas. A sequel to the deforestation is typically large scaleerosion, loss of soil nutrients and sometimes total desertification. Erosion barriers on disturbed slope, Marin County, California Techniques for improved soil conservation include crop rotation, cover crops, conservation tillage and planted windbreaks and affect both erosion and fertility. When plants, especially trees, die, they decay and become part of the soil. Code 330 defines standard methods recommended by the US Natural Resources Conservation Service. Contour plowing Contour plowing orients crop furrows following the contour lines of the farmed area. Furrows move left and right to maintain a constant altitude, which reduces runoff. Contour plowing was practiced by the ancient Phoenicians, and is effective for slopes between two and ten percent.[1] Contour plowing can increase crop yields from 10 to 50 percent, partially as a result from greater soil retention.[2] Terracing or terrace farming Terracing is the practice of creating nearly level areas in a hillside area. The terraces form a series of steps, each at a higher level than the previous. Terraces are protected from erosion by other soil barriers. Terraced farming is more common on small farms and in underdeveloped countries, since mechanized equipment is difficult to deploy in this setting. Keyline design Keyline design is an enhancement of contour farming, where the total watershed properties are taken into account in forming the contour lines. Perimeter runoff control Tree, shrubs and ground-cover are effective perimeter treatment for soil erosion prevention, by impeding surface flows. A special form of this perimeter or inter-row treatment is the use of a “grass way” that both channels and dissipates runoff through surface friction, impeding surface runoff and encouraging infiltration of the slowed surface water.[3] Windbreaks Windbreaks are sufficiently dense rows of trees at the windward exposure of an agricultural field subject to wind erosion.[4] Evergreen species provide year-round protection; however, as long as foliage is present in the seasons of bare soil surfaces, the effect of deciduous trees may be adequate. Cover crops/crop rotation thanking you for watching https://goo.gl/r1938O

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