中华全国合作总社供应业务第二批发管理局在1954、1955年度进口了几种新的化学肥料,如石灰氮、尿素、硝酸铵钙、硫硝酸铵等。这些肥料虽在很早以前就有,但在我国农村未用过的很多,在性能上与硫酸铵有些相仿,但还有它本身的特性,今将这几种肥料的性能及施用法作一简单的介绍。 The All-China Cooperative Socialist Association for Supply Business The Second Wholesale Authority imported several new chemical fertilizers such as lime nitrogen, urea, calcium ammonium nitrate, ammonium sulfate, etc. in 1954 and 1955. Although these fertilizers have long ago, but in our country a lot of unused in the past, some similar to the performance of ammonium sulfate, but also its own characteristics, the performance of these types of fertilizer and application of a brief introduction.