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In classical [1] soil science, humus is the dark organic matter in soil that is formed by the decomposition of plant and animal matter. It is a kind of soil organic matter. It is rich in nutrients and retains moisture in the soil. Humus is the Latin word for "earth" or "ground". [2]
The term comes from humus, which in turn comes from the Latin word humus, meaning "soil, earth". [1] Humic substances represent the major part of organic matter in soil , peat , coal , and sediments , and are important components of dissolved natural organic matter (NOM) in lakes (especially dystrophic lakes ), rivers, and sea water .
The formation of mull humus form results from various factors, including regional climate, parent rock, vegetation, and soil organism. [3] Mull order presents in deciduous forests, and the development is often associated with a mild climate in terms of warm temperature and moderate precipitation, also rich soil parent materials. [4]
Moder humus form may include only the Ah horizon or ectorganic horizons below end- organic horizons. [2] Fine humus elements have permeated the mineral soil on this horizon. Although soil animals may carry organic matter into the upper region of this horizon, this will only happen over a short distance. [2]
Soil has a crucial function in the global carbon cycle, with the global soil carbon pool estimated to be 2,500 gigatons. This is 3.3 times the amount of the atmospheric pool at 750 gigatons and 4.5 times the biotic pool at 560 gigatons.
Few medications have fascinated the public like GLP-1 receptor agonists, a class of drugs that includes Ozempic and Wegovy. Research shows that these medications can cause significant weight loss ...
There weren’t any surprises in the first set of rankings for the 12-team College Football Playoff. Oregon was the No. 1 team ahead of Ohio State, Georgia and Miami.
Rendzina (or rendsina) is a soil type recognized in various soil classification systems, including those of Britain [1] and Germany [2] as well as some obsolete systems. They are humus-rich shallow soils that are usually formed from carbonate- or occasionally sulfate-rich parent material. [2] Rendzina soils are often found in karst and ...