化肥深施技术（一）根据世界粮农组织与我国化肥试验的研究结果，我国粮食总产的３５－４０％由施化肥获得。尽管我国化肥施用量很大，但由于施用手段落后，肥料利用率低，平均利用率仅为３０％左右，而先进国家化肥平均利用率达６０％。１９９４年化肥深施技术列为农业部... Deep Fertilizer Technology (a) According to the World Food and Agricultural Research Institute of China’s fertilizer test results, 35-40% of China’s total grain output by fertilizer. Despite the large amount of chemical fertilizers applied in our country, due to the backward application methods, the fertilizer utilization rate is low, the average utilization rate is only about 30%, and the average utilization rate of fertilizer in advanced countries is 60%. 1994 fertilizer technology as a Ministry of Agriculture ...