编辑同志:当前,我省各社队使用过磷酸钙(过石)的数量不断增加。据我县半拉门公社几年来使用过石的经验.过石的增产作用和使用方法有密切关系。实践证明.过石最好和牲畜粪混拌施用。过石和牲畜粪的适宜比例是 1:10。要防止过石混拌小灰或炉灰,以免减低肥效。为了使混拌后的过石和牲畜粪迅速发酵,混拌时应首先将 Editorial Comrades: At present, the number of superphosphate (over stone) used by various social teams in our province is constantly increasing. According to my county half-door commune experience over the past few years using stone. The role of stone production and use are closely related. Practice has proved that the best stone mixed with livestock manure application. The appropriate proportion of over-stone and livestock manure is 1:10. To prevent over mixing stone ash or ash, lest reduce fertilizer efficiency. In order to mix the stone and livestock excrement rapid fermentation, mixing should be the first