【判断题】【消耗次数：1】
有机态氮是植物吸收氮的主要形式
①
正确
②
错误
参考答案：
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相关题目
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在测定土壤全氮时,一般用( )将样品中的亚硝态氮氧化为硝态氮后,再用( )还原( )水杨酸使全部硝态氮还原,转化成铵态氮
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