Humus
Concept
HUmus Chemistry Genesis, Composition, Reactions
1982 · F. J. Stevenson
Humus Chemistry—Genesis, Composition, Reactions
1983 · J. W. Parsons · Soil Science
Ameliorating physical and chemical properties of highly weathered soils in the tropics with charcoal - a review
2002 · Bruno Glaser, Johannes Lehmann, et al. · Biology and Fertility of Soils