夹皮沟公社挂钟岭大队四队广大贫下中农,根据几年来粪肥少和施粪方法不当,造成产量不高的经验教训,1973年在科学种田上狠抓了集中施肥,效果很好。粮食总产量由过去的8～9万斤,一跃增加到15万斤。他们的做法是: 1.刨大窝,集中施肥。这个生产队每亩地平均只有两车粪,采取老办 Jiapigou commune hanging Zhongling Brigade four teams majority of poor and middle peasants, according to several years of inadequate manure and manure improper method, resulting in low yield of experience and lessons, in 1973 in the scientific farming pay close attention to concentrated fertilization, the effect is very good. The total output of grain has risen to 150,000 jin from 80,000 to 90,000 jin in the past. Their approach is: 1. Planing large nest, concentrated fertilization. This production team has an average of only two car dung per mu, taking the old office