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Интеллектуальная Система Тематического Исследования НАукометрических данных |
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Chemical properties, humus status and biological production have been assessed for sod-podzolic soil of similar genesis and different cultivation intensity: features of initial soil have been studies as well. The yield of maize on this series of soils displayed a positive correlation with pH, humus and nitrogen content, exchangeable bases, content of calcium humates and labile humic acids.