223 resultados para Sima, Guang, 1019-1086.

Natural nitrogen-15 abundance of ammonium nitrogen and fixed ammonium in soils

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Rations of closely related elements in soil and their implications

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Study on variation in 15N natural abundance : I.

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Determination of reducing substances in soils by a voltammetric methd

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Determination of reducing substances in soils by a voltammetric methods

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Voltammetric determination oof rducing substances in paddy soils

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Organic reduction of iron and manganese oxides in relation to tertility of paddy

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Prediction of impacts of large-scale water conservancy projects on soil saliniza

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Micromorphological features as the indication of the fertility of paddy soils

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Voltammetric determination oof rducing substances in paddy soils

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Organic reduction of iron and manganese oxides in relation to tertility of paddy

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Prediction of impacts of large-scale water conservancy projects on soil saliniza

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Determination of redox potential(EH) by depolarizing curve method

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Residual BHC in paddy soils and its contamination to rice

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Determination of the activity ratio of nitrate to chloride with ion-selective electrodes in soil suspension

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