Highly decomposed organic material Small amounts of fiber can be identified to botanical origin (NWWG 1988)
{s} of or pertaining to humus, of soil rich in organic material; found or contained in humus
having a high organic carbon content; in Ferralsols and Nitisols more than 1 4 percent (by weight) organic carbon in the fine earth fraction as weighted average over a depth of 100 cm from the soil surface, in Leptosols more than 2 percent (by weight) organic carbon in the fine earth fraction to a depth of 25 cm from the soil surface, and in other soils more than 1 percent (by weight) organic carbon in the fine earth fraction to a depth of 50 cm from the soil surface