The role of organic matter as a source of nitrogen in Douglas-fir forest soils.

Abstract

The organic material supplied the forest soil by deposits of needles, deadwood and roots, and soil insect remains, decomposes to form humus, defined as the plant and animal residues of the soil, fresh surface litter excluded, which are undergoing evident decomposition (2). This decomposition is necessary before the nutrient elements contained in the organic litter can become available for use by plants.

Citation

Tarrant, Robert F. 1948. The role of organic matter as a source of nitrogen in Douglas-fir forest soils. PNW Old Series Research Notes No. 48, p. 1-5