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1983年按照中国农科院土肥所布署的全国化肥试验网,着重安排了不同氮磷钾配比试验。总计收到符合试验设计报告.的共28篇,其中水稻19篇,玉米8篇,小麦1篇。在各试验中除华宁水稻、怒江玉米(81—83年)及富民小麦设计略有修改而外,其他各地的试验均按统一设计进行,唯用氮量标准略有不同,其中幅度为8—24斤。其他要素则按氮用量进行不同配比布置。由于1983年前期
1983, according to the National Fertilizer Experimental Network deployed by the Chinese Academy of Agricultural Sciences soil fertilizers, focused on arranging different N, P and K ratio test. A total of 28 articles were received in line with the design report of the experiment, including 19 rice, 8 maize and 1 wheat. In addition to the slight modification to the design of Huaining rice and Nujiang corn (81-83 years) and Fumin wheat in all the experiments, the tests in other areas were carried out according to the uniform design with only a slight difference in the nitrogen standard, of which the amplitude was 8 -24 pounds. Other factors according to the amount of nitrogen for different ratio of layout. As early as 1983