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1986～1989年我们进行了有机物料与氮磷肥配施时马铃薯产量和品质影响的试验得到了一些有价值的数据,现将试验情况简报如下。
From 1986 to 1989, we carried out some valuable data on the effects of organic materials and nitrogen and phosphorus on the yield and quality of potatoes. The experimental report is as follows.