humus

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Related to Humic matter: humic acid, Humic substances

humus

the organic material that is derived from the breakdown of plant and animal material occurring in the surface layers of the soil. Humus is black and colloidal in nature, coating the soil particles and improving the fertility of soil in several ways:
  1. in acting as a reservoir of numerous nutrients which it prevents from leaching deeper into the soil layers;
  2. in increasing the water holding capacity of the soil and
  3. in improving the soil texture (friability).
References in periodicals archive ?
Sorption of organic pollutants on anthropogenic humic matter, Environmental Science & Technology 29: 941-950.
Tan, Humic matter in soil and the environment, Principles and controversies.
Tan KH (2003) 'Humic matter in soil and the environment: principles and controversies.' (Marcel Dekker: New York)
These contradictory statements inspired us to carry out our own analyses of humic matter in the groundwater of the town of Kogalym, Tyumen, Siberia, Russian Federation.
(18.) Lehtonen T, Peuravuori J, Pihlaja K: Characterisation of lake-aquatic humic matter isolated with two different sorbing solid techniques: tetamethylammonium hydroxide treatment and pyrolysis-gas chromatography/mass spectrometry, Anal.
Comparisons of sediments reveal that metal concentrations in humic matter can be up to 1,000 times greater than those not containing humic matter.
Dissolved humic matter (DHM, detrital carbon of terrestrial or littoral origin) in surface waters, which was earlier considered as comparatively recalcitrant, especially with respect to bacterial utilization, has in recent years been shown to be markedly photoreactive (Kieber et al.
Effect of humic matter extracted from compost and from leonardite on P nutrition of rye-grass, p.