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Differences of some properties of humic acids within the profile of gray forest soil


, : Differences of some properties of humic acids within the profile of gray forest soil. Vestnik Leningradskogo Universiteta Biologiya (4): 111-113

The degree of condensation of humic acids in gray-forest soil increases with depth. It is characterized by modification of their optical properties and by the value of the threshold of coagulation of their solutions.

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