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Nature of the humus of humic allophane soils in Japan. Part 2. Some physico-chemical properties of humic and fulvic acids



Nature of the humus of humic allophane soils in Japan. Part 2. Some physico-chemical properties of humic and fulvic acids



Soil Sci. Pl. Nutr 11(5): 9-15



Humic and fulvic acids were separated from three humic allophane soils. Humic acids have high C contents, high C/H and C/N ratios, and low A log K. Degree of humification is perhaps promoted by the action of allophane. In general, the progress of humification increases from north to south Japan.

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