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
Economic water scarcity for drinking and cooking alone. This observation suggests that putting too much emphasis on drinking water needs addresses an insignificant part of the problem of water resources and therefore limits the range of solutions available. Large parts of Africa suffer from economic water scarcity; developing water infrastructure there could therefore help to reduce poverty. Investing in water retention and irrigation infrastructure would also help to increase food production, especially in developing countries that largely rely on low-yield agriculture. Being able to provide a community with water that is adequate for consumption would also greatly benefit the people’s health. Overcoming this