论文部分内容阅读
过磷酸钙施入土壤后,常因效果差.近年来有人将过磷酸钙和士壤的固定丧失肥效,从而使增产有机肥混沤后施用,获得了较好的
After the superphosphate applied to the soil, often due to poor results in recent years, some people lose the effect of fixed superphosphate and citric acid soil, so that the yield of organic fertilizer mixed use, get better