经我县1977—1980年在大小春作物上施用证明,碳铵与过磷酸钙和石骨子按一定比例堆沤(简称石骨子“三合肥”)肥效好。如我所在田间与等量碳铵、过磷酸钙对比试验,亩施1500—2000斤石骨子“三合肥”,小麦、玉米、水稻_般可增产10％以上。现已在市郊和相邻县大面积推广。 By the county in 1977-1980 on the size of spring crops on the application shows that ammonium bicarbonate and superphosphate and stone bones according to a certain percentage of heap 沤 (referred to as “stone” three Hefei) fertilizer effect. Such as my field with the same amount of ammonium bicarbonate, superphosphate contrast test, 1500-2000 kg of Shi Shi Kung Shi “three Hefei”, wheat, corn, rice _ can yield more than 10%. Now in the suburbs and adjacent counties large-scale promotion.