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我们针对生产中存在的问题,自1976年以来,连续几年多点试验,在春小麦上对氮磷钾化肥的肥效及氮磷化肥施用技术进行了研究探讨。
In response to the problems in production, we have tried for many years in succession since 1976 to study the fertilizer efficiency of NPK fertilizers and the application technologies of nitrogen and phosphorus fertilizers on spring wheat.