humus defined in 1951 yearhumus - humus;
humus - Complex organic matter resulting from decomposition of plant and animal tissue in the soil, which gives to surface layer of soil its characteristically dark colour; of great importance for plant growth. Colloidal, improving texture and water holding capacity of soil and forming a reservoir of mineral nutrients which are absorbed by humus and prevented from being leached away.
near humus in Knolik
definition of word "humus" was readed 982 times