山东省即墨县移风公社后古城大队由于地处涝洼,种植稻茬麦时,往往因地湿难整坷垃多,播种质量差,出苗率低,产量只有100多斤。该队经过总结群众经验,发现稻茬麦进行清棵,可以收到较好的增产效果。1974年第四生产队清棵10亩,小麦亩产280斤,比不清棵的小麦亩产180斤,增产55％。该队今年750亩稻茬麦全部进行了清棵,小麦亩产345斤,比去年亩产153斤,增产79.6％。清棵的好处是: Since the ancient city of Shimonoseki commune in Shandong Province, the ancient city brigade is located in the waterlogged depression, when planting rice stubble wheat, it is often because of wet stubborn rubbish, seeding quality is poor, the rate of emergence is low, the output is only 100 kilos. After the team summed up the experience of the masses found that rice stubble clearing trees, you can receive a better yield. In 1974, the fourth production team cleared 10 acres of trees, 280 acres of wheat per mu, less than the clear wheat yield of 180 acres of trees, an increase of 55%. The 750 acres of paddy wheat this year, all carried out clear trees, 345 acres of wheat per mu, 153 kg more than last year, an increase of 79.6%. The benefits of clearing trees are: