| 摘要 |
A soil improver is provided to neutralize and prevent acidification of soil, to increase the content of helpful organic compound, to recover fertility of soil, and to strengthen air permeability and water retainability through aggregation promotion of soil. A method for manufacturing a soil improver comprises the steps of: (st11,st12) preparing raw material powder including silicate-based clay mineral, calcium compound, organic acid and mineral sulfur; (st13,st14) mixing the raw material powder, adding moisture, and assembling, drying and granulating the mixture to make solid; (st15) drying the granulated materials at a temperature of 200 ‹C or greater; (st16) mixing a microbial agent and liquid organic fertilizer to the granulated material dried at high temperature; and (st17) drying the mixture at a temperature of 60‹C or less.
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