Table of Contents
What type of soils are Aridisols?
Aridisols (from Latin aridus, “dry”) are CaCO3-containing soils of arid regions that exhibit subsurface horizon development. They are characterized by being dry most of the year and limited leaching. Aridisols contain subsurface horizons in which clays, calcium carbonate, silica, salts and/or gypsum have accumulated.
Where is Histosols soil?
Most Histosols occur in Canada, Scandinavia, the West Siberian Plain, Sumatra, Borneo and New Guinea. Smaller areas are found in other parts of Europe, the Russian Far East (chiefly in Khabarovsk Krai and Amur Oblast), Florida and other areas of permanent swampland.
What does Alfisols and Ultisols mean?
Ultisols differ from Alfisols by their few mineral nutrients and high content of aluminum. They differ from Oxisols by the lack—or sometimes deep displacement—of a horizon enriched in aluminum and iron oxides and in kaolin clay minerals.
Where is Aridisols soil found?
Aridisols occur extensively in the southwestern United States and Australia, northwestern Mexico, and the Sahara and across Asia south of the steppe regions.
Where are Histosols found in Bangladesh?
They have been included as Histosols. Grey Piedmont soils Occur extensively on the northern and eastern Piedmont Plains and locally on the Chittagong coastal plain.
What is Ultisols soil?
Ultisols (from Latin ultimus, “last”) are strongly leached, acid forest soils with relatively low native fertility. They are found primarily in humid temperate and tropical areas of the world, typically on older, stable landscapes.
What climate are Spodosols found in?
Spodosols are most commonly associated with a cool and wet climate, but also occur in warmer climes such as in Florida, USA . Large areas of Spodosol are found in northern Europe, Russia, and northeastern North America . Require inputs of lime and fertilizers to be agriculturally productive.
What climate are Aridisols in?
Aridisols are dry, desertlike soils that have low organic content and are sparsely vegetated by drought- or salt-tolerant plants. (Not included in this order are soils located in polar regions or high-elevation settings.) Dry climate and low humus content limit their arability without irrigation.
What is the meaning of vertisols?
Vertisols (from Latin verto, “turn”) are clay-rich soils that shrink and swell with changes in moisture content. During dry periods, the soil volume shrinks and deep wide cracks form. The soil volume then expands as it wets up.
What is Ultisol soil?
What are Alfisols used for?
Alfisols are primarily found in temperate humid and subhumid regions of the world. The combination of generally favorable climate and high native fertility allows Alfisols to be very productive soils for both agricultural and silvicultural use.
What is a Histosol soil?
Histosols are acidic, organic soils that form when fallen plant material decomposes more slowly than it accumulates. Most soil classifications, including Soil Taxonomy, separate mineral soils from organic soils. Histosols are soils that consist of dominantly organic soil materials.
What is Aridisol soil?
Aridisols (from Latin aridus, “dry”) are CaCO3-containing soils of arid regions that exhibit subsurface horizon development. They are characterized by being dry most of the year and limited leaching. Aridisols contain subsurface horizons in which clays, calcium carbonate, silica, salts and/or gypsum have accumulated.
Why are Histosols ecologically important?
As a result, Histosols are ecologically important because of the large quantities of carbon they contain. These soils occupy approximately 1.2 percent of the ice-free land area globally and approximately 1.6 percent of the U.S.
Why are aridisols not used for agriculture?
Because of the dry climate in which they are found, they are not used for agricultural production unless irrigation water is available. Aridisols occupy approximately 12 percent of the Earth’s ice-free land area and approximately 8.3 percent of the U.S.