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19 de ago. de 2018 · Desert soil often has scanty organic matter and plenty of calcium carbonate, gypsum and salt. While mature desert soils commonly take the form of an Aridisol, many desert landscapes feature very young soils slowly forming on stony or sandy ground, plus extensive tracts lacking soil altogether.
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19 de oct. de 2023 · The desert biome covers about one-fifth of Earth’s surface. This biome has a layer of soil that can either be sandy, gravelly, or stony, depending on the type of desert. Deserts usually get at most 50 centimeters (20 inches) of rainfall a year, and the organisms that live in deserts are adapted to this extremely dry climate.
Desert soils form in areas where the demand for water by the atmosphere (evaporation) and plants (transpiration) is much greater than precipitation. Deserts cover 20 to 33% of the Earth’s land surface, and can be found in the tropics, at the poles, and in between.
Large areas of desert soil are irrigated by water pumped from underground sources or brought by canal from distant rivers or lakes. The booming Inland Empire of southeastern California is made up of deserts (the Mojave and the Sonoran) that rely on water for agriculture , in dustry , and residential development.
Soils and Desert Life. Soils of the desert teem with living things. Plant life ranging from single-celled cyanobacteria to giant saguaro reside on and in the soil. Tunneling termites and burrowing mammals turn over the soil. The activity of some organisms is very ephemeral and occurs in a short span of time after rains.
Desert soils occupy approximately 46 million km 2, or 31.5% of the Earth’s surface, with Aridisols, Entisols, and Inceptisols constituting over 85% of the global desert soils (Dregne, 1976). The majority of desert soils with relatively well-developed soil horizons fall into the Aridisol classification.
Aridisols (or desert soils) are a soil order in USDA soil taxonomy. Aridisols (from the Latin aridus , for "dry", and solum ) form in an arid or semi-arid climate. Aridisols dominate the deserts and xeric shrublands , which occupy about one third of the Earth's land surface.
