怎样用煤灰做肥料据测定，煤灰中一般含氮和磷（五氧化二磷，）都在０．２％左右，含钾（氧化钾）０．３％－０．５％，含钙（氧化钙）８．５％。粘土地施用煤灰，可增加土壤通透性，改善土壤的团粒结构和耕性；在盐碱地施用煤灰，可减轻土镶返碱，改良盐碱地。煤灰制肥有... How to do with coal ash fertilizer According to the determination of coal ash generally containing nitrogen and phosphorus (phosphorus pentoxide,) are about 0.2%, potassium (potassium oxide) 0.3% -0.5%, calcium (Calcium oxide) 8.5%. The application of coal ash in clay can increase the permeability of the soil and improve the aggregate structure and tillage of the soil. Applying coal ash in saline-alkali soil can reduce soil setting and alkali recovery and improve saline-alkali land. Coal ash fertilizer ...