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
Grain yield monitor harvester speed can be obtained by ground speed measurement from measuring the wheel speed of the harvester, radar mounted on the harvester, or by GPS. The head, as it is referred to is the device mounted on the front of the harvester by which the crop is gathered into the harvester. The width of the head is determined by the effective width of crop that can be harvested as the combine moves in the forward direction. formula_1 formula_2 The yield monitor is the device that records the data that determines the grain yield and the grain yield itself. Today's yield