nitrogen content meaning in English

氮含量
含氮量
总氮量

After harvesting the crops, he tested them for nitrogen content .
作物收获后，他测定了作物中氮的含量。
Some methods to reduce nitrogen content in liquid argon
减少液氩中含氮量的几点做法
Determination of urea determination of total nitrogen content
总氮含量的测定
Test methods for nitrogen content of nitrogen - doped getter
掺氮吸气剂含氮量测试方法
Standard test method for rubber - nitrogen content
橡胶的标准试验方法.氮含量

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