Biblioteca Digital

955 resultados para quaternary ammonium compounds

A preliminary study on quaternary red clay

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Study on characteristics of sediment from red soil deried from quaternary red

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A method for determing available fixed ammonium in soils

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Effects of different lead compounds on growth and heavy metal uptake of wetland

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Fate of N from green manures and ammonium sulfate

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

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Fixed ammonium content and ammonium fixing ability of some cultivated soilk in china

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A preliminary study on quaternary red clay

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Study on characteristics of sediment eroded from red soil derived from quaternary red clay

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Transport of ammonium and potassium ions to rice roots and their interaction in the nutrient uptake process

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Study on characteristics of sediment from red soil derived from quaternary red clay

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Dating of quaternary red earth by electron spin resonance(ESR)

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Dating of quaternary red earth by ESR

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Variation in the relationship between nitrification and acidification of subtropical soils as affected by the addition of urea or ammonium sulfate

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Variation in the relationship between nitrification and acidification of subtropical soils as affected by the addition of urea or ammonium sulfate

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