This paper is to study the activity of saccharase and the relation between the activity and the soil organic matter and all the nitrogen.

本试验是探索转化酶的活性及其与土壤有机质和全氮的关系。

youdao

This paper is to study the activity of saccharase and the relation between the activity and the soil organic matter and all the nitrogen.

本试验是探索转化酶的活性及其与土壤有机质和全氮的关系。

youdao