振荡浸提时间对不同保存方式土壤NO3-N和NH4-N含量测定值的影响
진탕침제시간대불동보존방식토양NO3-N화NH4-N함량측정치적영향
Effect of Oscillation and Extraction Time on Measurement of Content of NO3-N and NH4-N in Soil Held by Different Saving Methods
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