| 摘要 |
PURPOSE:To enhance the capacity for growing plants, by mixing an arable soil with a cultivating agent obtained by adding a fly ash to a crystallline FeSO2.7H2O and heating and drying the mixture. CONSTITUTION:10-20pts.wt. fly ash is mixed with 80pts.wt. crystalline FeSO2.7 H2O. The mixture is heated and dried at 65-85 deg.C for 30min to 1hr to evaporate most of water of crustallization and, at the same time, to tightly bond FeSO4 to the fly ash chemically or physically for stabilization, thereby forming a cultivating agent which is in a coarse grain or powder form, weak alkaline and considerably soluble in water. The cultivating agent is mixed with an arable soil for agriculture or gradening. |
