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Composition of humus In soil and earth-worm castings (excrements) of black earth

Composition of humus In soil and earth-worm castings (excrements) of black earth

Roczniki glebozn 19: 163-173

Earthworm casts contained considerably more organic matter than soil samples (black soils developed on clays and moraine loams) taken from the same sites did; they contained considerably more non-extractable and alcohol/ benzene-soluble substances, were richer in Ca, P and K, and possessed higher NH4-fixing capacities.

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