作物秸秆中含有植物生长所需的养分,如果把秸秆从耕地中搬移出去的话,那么作物生长所需要的养分同时也就被带走了.耕地中秸秆的减少将使风蚀与水蚀量增加,而由风力和水力侵蚀掉的泥沙中也含有植物需要的养分.在目前的耕作措施条件下,由秸秆搬移和侵蚀带走养分的现象在玉米带(Corn Belt)比在美东南部(Southeast)、俄勒冈州中部(central Oregon)和大平原(Great Plains)都严重. Crop stalks contain the nutrients needed for the growth of plants, and if the stalks are removed from the cultivated land, the nutrients needed for crop growth are also taken away. The reduction of straw in cultivated land will increase the amount of wind and water erosion, The silt that is eroded by wind and water also contains the nutrients needed by the plant Under the current tillage measures, the phenomenon of nutrient removal by straw removal and erosion is more pronounced in Corn Belt than in the Southeast of the United States, Central Oregon and the Great Plains are all serious.