Humus definition

Humus means a complex amorphous aggregate, formed during the microbial decomposition or alteration of plant and animal residues and products synthesized by soil organisms; principal constituents are derivatives of lignins, proteins, and cellulose combined with inorganic soil constituents and for water absorption.
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Humus means a dark or black carbon-rich relatively stable residue resulting from the decomposition of organic matter that retains nutrients and slowly releases nutrients to plants and increases the ability of the soil to retain water.
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Examples of Humus in a sentence

  • Humus – organic portion of the soil remaining after prolonged microbial decomposition.

  • Humus base fertilizer is to be applied directly following spring and fall aeration operations.

  • Schweizerische Zeitschrift für Forstwesen 12, 530-535 Hagedorn F (2009) Humus, ein grosser Speicher, aber eine kleine Senke für atmosphärisches CO2.

  • Humus: Partially decomposed organic material found in soil and water.

Related to Humus

  • Embalmer means any person engaged in the practice of embalming.

  • Holocene means the most recent epoch of the Quaternary period, extending from the end of the Pleistocene Epoch to the present.

  • Graywater means untreated wastewater that has not been contaminated by any toilet discharge, has not been affected by infectious, contaminated, or unhealthy bodily wastes, and does not present a threat from contamination by unhealthful processing, manufacturing, or operating wastes. “Graywater” includes, but is not limited to, wastewater from bathtubs, showers, bathroom washbasins, clothes washing machines, and laundry tubs, but does not include wastewater from kitchen sinks or dishwashers. Health and Safety Code Section 17922.12.

  • Spring means a source of water where an aquifer comes in contact with the ground surface.

  • Forest means an area of land defined by the minimum values for area size, tree crown cover or an equivalent stocking level, and potential tree height at maturity at the place of growth of the trees as specified for each Member State in Annex II. It includes areas with trees, including groups of growing, young, natural trees, or plantations that have yet to reach the minimum values for tree crown cover or an equivalent stocking level or minimum tree height as specified in Annex II, including any area that normally forms part of the forest area but on which there are temporarily no trees as a result of human intervention, such as harvesting, or as a result of natural causes, but which area can be expected to revert to forest;