我县广大干部和贫下中农认真总结科学施肥经验,1976年全县75万亩玉米全面推广碳酸氢铵深坑追肥方法,减少了由于碳酸氢铵不稳定、易挥发而造成的肥效损失,提高了粮食产量。据土城、炮台、镇郊、驼山和得利寺等公社调查,深坑追肥比表土追施每亩增产70斤以上。 The vast majority of cadres and poor middle peasants in our county summed up the scientific fertilization experience earnestly, in 1976 the county 750,000 acres of corn to promote ammonium bicarbonate deep pit top dressing methods to reduce the ammonium bicarbonate instability, volatile loss caused by fertilizer, increased Food production. According to Tucheng, Fort, suburbs, Camel Hill and Temple and other communes investigation, pit pit top dressing than topsoil yield more than 70 pounds.