| 摘要 |
The present invention relates to a method for enhancing the water-retention capacity of soils and providing plant nutrients to same over an extended period of time. This method comprises the admixing of soils with from 2 to 30% by weight of a chryso-zeolite of type A/and or X which comprises a magnesium leached asbestos matric having an SiO2 content of 37 to 60 wt%, an MgO content of 0.1 to 15% by weight, an Fe2O3 content of 0.1 to 2.5% by weight and containing from 10 to 25% by weight of Al2O3 and from 25 to 35% by weight of Na2O, and/or K2O, and/or CaO, and/or (NH4)2O. |
