Typic Haplosalid and landscape AE
A Typic Haplosalid from the interior of the UAE.
Typic Haplosalids are the Haplosalids that do not have a calcic, gypsic, or petrogypsic horizon or a duripan with an upper boundary within 100 cm of the soil surface. Before 1994, these soils were identified as Torriorthents if a salic horizon was the only diagnostic horizon. In the United States, these soils occur in California.
Haplosalids are the Salids that have a high concentration of salts but do not have the saturation that is associated with the Aquisalids. Haplosalids may be saturated for shorter periods than Aquisalids, may have had a water table associated with a past climate, or a water table that occurs below 100 cm. In the Four Corners area of the United States, salic horizons have formed without the influence of a water table in saline parent materials.
Salids are most common in depressions (playas) in the deserts or in closed basins in the wetter areas bordering the deserts. In North Africa and in the Near East, such depressions are referred to as Sabkhas or Chotts, depending on the presence or absence of surface water for prolonged periods. Under the arid environment and hot temperatures, accumulation of salts commonly occurs when there is a supply of salts and a net upward movement of water in the soils. In some areas a salic horizon has formed in salty parent materials without the presence of ground water.
The most common form of salt is sodium chloride (halite), but sulfates (thenardite, mirabilite, and hexahydrite) and other salts may also occur. The concept of Salids is one of accumulation of an excessive amount of salts that are more soluble than gypsum. This is implicit in the definition, which requires a minimum absolute EC of 30 dS/m in 1:1 extract (about 2 percent salt) and a product of EC and thickness of at least 900. As a rule, Salids are unsuitable for agricultural use, unless the salts are leached out. Leaching the salts is an expensive undertaking, particularly if there is no natural outlet for the drainage water. Two great groups are recognized—Aquisalids, which are saturated with water for 1 month or more during the year, and Haplosalids, which are drier.
For more information about describing soils, visit:
www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_052523...
For additional information about soil classification using Soil Taxonomy, visit:
sites.google.com/site/dinpuithai/Home
For more information about soil classification using the UAE Keys to Soil Taxonomy, visit:
agrifs.ir/sites/default/files/United%20Arab%20Emirates%20...
Typic Haplosalid and landscape AE
A Typic Haplosalid from the interior of the UAE.
Typic Haplosalids are the Haplosalids that do not have a calcic, gypsic, or petrogypsic horizon or a duripan with an upper boundary within 100 cm of the soil surface. Before 1994, these soils were identified as Torriorthents if a salic horizon was the only diagnostic horizon. In the United States, these soils occur in California.
Haplosalids are the Salids that have a high concentration of salts but do not have the saturation that is associated with the Aquisalids. Haplosalids may be saturated for shorter periods than Aquisalids, may have had a water table associated with a past climate, or a water table that occurs below 100 cm. In the Four Corners area of the United States, salic horizons have formed without the influence of a water table in saline parent materials.
Salids are most common in depressions (playas) in the deserts or in closed basins in the wetter areas bordering the deserts. In North Africa and in the Near East, such depressions are referred to as Sabkhas or Chotts, depending on the presence or absence of surface water for prolonged periods. Under the arid environment and hot temperatures, accumulation of salts commonly occurs when there is a supply of salts and a net upward movement of water in the soils. In some areas a salic horizon has formed in salty parent materials without the presence of ground water.
The most common form of salt is sodium chloride (halite), but sulfates (thenardite, mirabilite, and hexahydrite) and other salts may also occur. The concept of Salids is one of accumulation of an excessive amount of salts that are more soluble than gypsum. This is implicit in the definition, which requires a minimum absolute EC of 30 dS/m in 1:1 extract (about 2 percent salt) and a product of EC and thickness of at least 900. As a rule, Salids are unsuitable for agricultural use, unless the salts are leached out. Leaching the salts is an expensive undertaking, particularly if there is no natural outlet for the drainage water. Two great groups are recognized—Aquisalids, which are saturated with water for 1 month or more during the year, and Haplosalids, which are drier.
For more information about describing soils, visit:
www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_052523...
For additional information about soil classification using Soil Taxonomy, visit:
sites.google.com/site/dinpuithai/Home
For more information about soil classification using the UAE Keys to Soil Taxonomy, visit:
agrifs.ir/sites/default/files/United%20Arab%20Emirates%20...