organic forms of soil nitrogen 土壤氮的有机类型
Great part of soil nitrogen is organic forms.
土壤有机氮的分解矿化是可矿化氮的根本来源。
SummaryResults available showed that soil age did no significant effect on the distribution of the forms of soil organic nitrogen.
现有的材料说明，土壤年龄对土壤的氮素形态分布没有明显的影响。
The result shows that the content of soil organic matter, total nitrogen and different forms nitrogen decreased firstly, then increased by time pasted.
结果表明，该区域土壤有机质、全氮及各形态氮素含量呈现先降后升的趋势。
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