王铜是河南省西峡县五里桥乡白河村农民， 1973年高中毕业回乡务农。他看到，每当收获季节，农民把收获后的庄稼秸秆挖掉拿出地块或一把火烧掉，致使土地缺乏有机质。与此同时化肥大量的使用，又导致微量元素失调，氮磷钾不平衡，许多土地板结不抗旱，不耐涝，作物缺乏必要的矿 Wang Tong is a farmer in Shirakawa Village, Wuliqiao Township, Xixia County, Henan Province. After graduating from high school in 1973, he returned to rural areas for farming. He observed that every harvest season, peasants dug up the harvested crop stalks and burned out the land or a fire, resulting in a lack of organic matter in the land. At the same time a large number of fertilizer use, but also lead to imbalance of trace elements, NPK imbalance, many land compaction is not drought, waterlogging, lack of necessary crops