Crop rotation British Agricultural Revolution. The rotation between arable and ley is sometimes called ley farming. George Washington Carver (1860s–1943) studied crop-rotation methods in the United States, teaching southern farmers to rotate soil-depleting crops like cotton with soil-enriching crops like peanuts and peas. In the Green Revolution of the mid-20th century the traditional practice of crop rotation gave way in some parts of the world to the practice of supplementing the chemical inputs to the soil through topdressing with fertilizers, adding (for example) ammonium nitrate or urea and restoring soil pH with lime. Such practices aimed to increase yields, to prepare soil
Safe Drinking Water Act (USDW) means an aquifer with sufficient quality and quantity of ground water to supply a public water system now or in the future as defined by 40 C.F.R. § 144.3. Surface water quality is generally protected by the Clean Water Act. U.S. Congress by 42 United States Code (U.S.C.) § 300h(b) and 42 U.S.C. § 300h-1(C) prohibit any underground injection which endangers drinking water sources. The Ninth Circuit United States Court of Appeals while enforcing this prohibition of “harmful injections into drinking water aquifers” explains that underground injection of even clean water can result in the illegal movement of a