昌图县虻牛公社白山大队一队,过去追化肥是满地撒,有的虽然施后立即趟地,但常常盖土不严,化肥损失严重。1974年,这个队改进了施肥方法,在玉米拔节前全部采取刨坑深施,施后趟地,厚盖土。虽化肥用量增加不多,粮食平均亩产达到410斤,比19T3年增产将近一倍。七队生产 Changtu County Hunchun commune Baishan Brigade team, the past trace fertilizer is scattered Caesar, although some Shi immediately after the trip, but often cover the soil is not strict, serious loss of fertilizer. In 1974, the team improved the method of fertilization, all in the maize before the jointing pit deep pit facilities, facilities and after the trip, thick cover soil. Although the amount of fertilizer increased little, the average grain yield reached 410 pounds, 19T3 annual output will be almost equal. Seven teams produce