Where it is mainly used to improve soil physical, chemical and biological properties, so that i

For example, Shi Shihui used to adjust the pH value of acid soil, the application of gypsum to inhibit the Na+, HCO3-, and CO32- plasma, the use of beneficial microorganisms to improve soil biological activity, etc.. However, due to the improved soil structure of the material is widely used, so people used to improve the soil structure and soil

Modified agent.