soil secondary mineral

例句：

1. 1.The soil is rich in organic matter, which makes it suitable for plant growth.
   土壤富含有机物质，这使其适合植物生长。
2. 2.The presence of secondary minerals can affect the properties of the soil.
   次生矿物的存在会影响土壤的性质。
3. 3. The study of soil secondary minerals has important implications for agricultural productivity.
   研究土壤次生矿物对农业生产具有重要影响。