题目内容

When the soil pH is 7.2, the concentration of H2PO4- and HPO42- was about equal.

查看答案

搜索结果不匹配？点我反馈

更多问题

Phosphorus is so called life nutrient element.

All of the essential element comes from the soil.

The geographic law of soil nitrogen is the same as the SOM

The quality element is ______ .