Soil in jujube garden

• 有机质

Soil in jujube garden的用法和样例：

例句

1. Additions of organic matter to soil hasten calcium losses.
   土壤增施有机质会促进钙的损失。
2. Fossil ostracods and charophytes are present in some beds.
   研究结果表明，红岗段主要为一套富含有机质的黑灰色钙质泥页岩，纹层理发育良好或不显著，夹碳酸盐岩和石膏薄层。