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(15N)土壤、植物标准样品
Standard soil and plant samples for (15N) isotope rate analysis
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土壤有机质测定法
Method for determination of soil organic matter
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碱化土壤交换性钠的测定
Determination of exchangeable sodium in alkaline soil
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森林土壤盐基饱和度的计算
Calculation of base-saturation percentage in forest foil
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森林土壤交换性钾和钠的测定
Determination of exchangeable potassium and sodium in forest soil
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森林土壤交换性钙和镁的测定
Determination of exchangeable calcium and magnesium in forest soil
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森林土壤交换性盐基总量的测定
Determination of total exchangeable base in forest soil
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森林土壤阳离子交换量的测定
Determination of cation exchange capacity in forest soil
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森林土壤石灰施用量的测定
Determination of lime requirement in forest soil
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