Correlation analysis indicated that the soil organic carbon density was significantly and positively correlated with the plow layer depth and total nitrogen content.
影响土壤有机碳密度关键因子是耕层厚度和土壤全氮含量,除潴育型土壤外,均达到了显著的正相关关系。
参考来源 - 南方水田土壤有机碳变化特征及保护性耕作增碳效应研究·2,447,543篇论文数据，部分数据来源于NoteExpress
实验研究了施氮对大豆全氮含量的影响。
Experimental study on the nitrogen of total nitrogen content of soybean.
而以硝态氮肥为氮源时，玉米叶片硝态氮含量和全氮含量最高。
In nitrate fertilizer sources, the contents of nitrogen and nitrate in maize were highest.
三个林型表层土壤全氮含量季节变化规律明显不同，总体变化幅度都不大。
Total nitrogen contents of surface soil in three forest types changed with seasons distinctly, and overall extents were not big.
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