《来自家庭农场的呼吁》,是一篇很好的教材,也是一篇很有力的号召书。它再一次说明种田不讲科学是不成的。你看张世福同志本想把羊粪、尿素、硝酸铵混合在一起,给小麦好好地追一次肥,可是由于不懂硝酸铵和尿素容易吸潮或易溶于水以及尿素在转换中使土壤暂时呈碱性的特点,混合后起理化变化,好心得到了坏效果。类似这样用肥不当的事,难道在农场只是偶然发生的一两次吗?本刊去年第四期就刊登过新湖二场播种棉花、玉米,因带种肥不当造 “Calls from family farms” is a very good teaching material and a very powerful call for help. It once again shows that farming without science can not be accomplished. You see Comrade Zhang Shifu would like to put sheep manure, urea, ammonium nitrate mixed together to chase wheat well to catch up with a fat, but because they do not understand ammonium nitrate and urea easily absorb moisture or soluble in water and urea in the conversion so that the soil temporarily Alkaline characteristics, mixed after the rational change, kindly got a bad effect. Similar to this improper use of fertilizer, is it only happened once or twice in the farm it? The fourth issue of last year, published in the new lake two sow cotton, corn, improper with kind of fat