... soil fauna 土壤动物区系 soil fertility component 地力组成因素 soil fertility nitrogen 地力氮 ...
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Principal component analysis was used to derive soil fertility variation factors.
运用主成分分析选取土壤肥力变异因子。
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Soil fertility could be evaluated objectively by principal component analysis.
土壤主成分分析能较为客观地评价土壤肥力水平。
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