磷肥是作物生长发育的三要素之一。据试验,亩产小麦609.3斤,需从土壤中吸取氮素16.84斤,磷5.4斤,钾11.3斤。遵照伟大领袖毛主席关于“氮、磷、钾肥料要很好的配合使用”的教导,为了合理施用磷肥,促进农业增产,我们进行了土壤速效磷的普查测定和磷肥肥效试验,兹分述如下: Phosphate fertilizer is one of the three elements of crop growth and development. According to the test, 609.3 kg of wheat per mu is required to draw 16.84 kg of nitrogen, 5.4 kg of phosphorus and 11.3 kg of potassium from the soil. Follow the guidance of Chairman Mao, the great leader, on “nitrogen, phosphorus and potassium fertilizers should be well used.” In order to rationally apply phosphate fertilizer and promote agricultural production, we conducted a general survey of soil available phosphorus and a fertilizer efficiency test. :