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Ultisol, commonly known as red clay soil, is one of twelve soil orders in the United States Department of Agriculture soil taxonomy. The word "Ultisol" is derived from "ultimate", because Ultisols were seen as the ultimate product of continuous weathering of minerals in a humid, temperate climate without new soil formation via glaciation .
Chernozem (/ ˈ tʃ ɜːr n ə z ɛ m / CHUR-nə-zem), [a] also called black soil, regur soil or black cotton soil, is a black-colored soil containing a high percentage of humus [3] (4% to 16%) and high percentages of phosphorus and ammonia compounds. [4] Chernozem is very fertile soil and can produce high agricultural yields with its high ...
In ecology, base-richness is the level of chemical bases in water or soil, such as calcium or magnesium ions. Many organisms prefer base-rich environments. [1] Chemical bases are alkalis, hence base-rich environments are either neutral or alkaline. Because acid-rich environments have few bases, they are dominated by environmental acids (usually ...
However, silt is very vulnerable to erosion, and it has poor mechanical properties, making construction on silty soil problematic. The failure of the Teton Dam in 1976 has been attributed to the use of unsuitable loess in the dam core, and liquefication of silty soil is a significant earthquake hazard. Windblown and waterborne silt are ...
A soil type or a lichen substrate rock type that is rich in or largely composed of calcium carbonate. calceolate Shaped like a slipper. [25] calcicole A plant which thrives in calcareous soil. Also calciphile, calciphyte. Antonym: calcifuge. [25] callose Hardened; thickened; callous. callus. pl. calli. 1. A protruding mass of tissue 2.
Mollisol is a soil type which has deep, high organic matter, nutrient-enriched surface soil (), typically between 60 and 80 cm (24-31 in) in depth.This fertile surface horizon, called a mollic epipedon, is the defining diagnostic feature of Mollisols.
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 ...
The causes of soil alkalinity can be natural or man-made: The natural cause is the presence of soil minerals producing sodium carbonate (Na 2 CO 3) and sodium bicarbonate (NaHCO 3) upon weathering. Coal-fired boilers / power plants, when using coal or lignite rich in limestone, produce ash containing calcium oxide.