我们昌图县金家公社,于1971年春开始在种子场、五一、酒馆等大队搞了“长效肥料”的肥效对比试验。二年来实践证明,“长效肥料”劲大效果好,为今后科学用肥,合理用肥,提高单位面积产量找到了新的方法。去年我们于种子场和五一大队,在水田上 We Changtu County Golden Commune, in the spring of 1971 in the seed field, 51, pubs and other brigade engage in “long-term fertilizer” fertilizer efficiency comparison test. Practice over the past two years has proved that “long-term fertilizer” is of great effect and has found a new way for scientific use of fertilizers, rational use of fertilizer and improvement of yield per unit area. Last year we were on the seed field and the 51st Battalion, on paddy fields