Haplogypsid and landscape AE
A Salidic Haplogypsids, petrogypsic in the UAE.
Salidic Haplogypsids, petrogypsic are the Haplogypsids that have ECe of more than 8 to less than 30 dS m −1 in a layer 10 cm or more thick within 100 cm of the soil surface and a petrogypsic horizon at a depth of more than 100 to 200 cm.
For more information about soil classification in the UAE, visit:
library.wur.nl/isric/fulltext/isricu_i34214_001.pdf
Haplogypsids are the Gypsids with no petrogypsic, natric, argillic, or calcic horizon that has an upper boundary within 100 cm of the soil surface. Some Haplogypsids have a cambic horizon overlying the gypsic horizon. These soils are commonly very pale in color. They are not extensive in the United States. The soils are more common in other parts of the world.
Gypsids are the Aridisols that have a gypsic horizon within 100 cm of the soil surface. Accumulation of gypsum takes place initially as crystal aggregates in the voids of the soils. These aggregates grow by accretion, displacing the enclosing soil material. When the gypsic horizon occurs as a cemented impermeable layer, it is recognized as the petrogypsic horizon. Each of these forms of gypsum accumulation implies processes in the soils, and each presents a constraint to soil use. One of the largest constraints is dissolution of the gypsum, which plays havoc with structures, roads, and irrigation delivery systems. The presence of one or more of these horizons, with or without other diagnostic horizons, defines the great groups of the Gypsids. Gypsids occur in Iraq, Syria, Saudi Arabia, Iran, Somalia, West Asia, and some of the most arid areas of the western part of the United States. Gypsids are on many segments of the landscape. Some of them have calcic or related horizons that overlie the gypsic horizon.
Aridisols, as their name implies, are soils in which water is not available to mesophytic plants for long periods. During most of the time when the soils are warm enough for plants to grow, soil water is held at potentials less than the permanent wilting point or has a content of soluble salts great enough to limit the growth of plants other than halophytes, or both. There is no period of 90 consecutive days when moisture is continuously available for plant growth. Because of an extreme imbalance between evapotranspiration and precipitation, many Aridisols contain salts. The dominant process is one of accumulation and concentration of weathering products. The accumulation of salts is the second most important constraint to land use.
For more information about soil classification in the UAE, visit:
vdocument.in/united-arab-emirates-keys-to-soil-taxonomy.h...
For more information about describing and sampling soils, visit:
www.nrcs.usda.gov/resources/guides-and-instructions/field...
or Chapter 3 of the Soil Survey manual:
www.nrcs.usda.gov/sites/default/files/2022-09/The-Soil-Su...
For additional information on "How to Use the Field Book for Describing and Sampling Soils" (video reference), visit:
www.youtube.com/watch?v=e_hQaXV7MpM
Haplogypsid and landscape AE
A Salidic Haplogypsids, petrogypsic in the UAE.
Salidic Haplogypsids, petrogypsic are the Haplogypsids that have ECe of more than 8 to less than 30 dS m −1 in a layer 10 cm or more thick within 100 cm of the soil surface and a petrogypsic horizon at a depth of more than 100 to 200 cm.
For more information about soil classification in the UAE, visit:
library.wur.nl/isric/fulltext/isricu_i34214_001.pdf
Haplogypsids are the Gypsids with no petrogypsic, natric, argillic, or calcic horizon that has an upper boundary within 100 cm of the soil surface. Some Haplogypsids have a cambic horizon overlying the gypsic horizon. These soils are commonly very pale in color. They are not extensive in the United States. The soils are more common in other parts of the world.
Gypsids are the Aridisols that have a gypsic horizon within 100 cm of the soil surface. Accumulation of gypsum takes place initially as crystal aggregates in the voids of the soils. These aggregates grow by accretion, displacing the enclosing soil material. When the gypsic horizon occurs as a cemented impermeable layer, it is recognized as the petrogypsic horizon. Each of these forms of gypsum accumulation implies processes in the soils, and each presents a constraint to soil use. One of the largest constraints is dissolution of the gypsum, which plays havoc with structures, roads, and irrigation delivery systems. The presence of one or more of these horizons, with or without other diagnostic horizons, defines the great groups of the Gypsids. Gypsids occur in Iraq, Syria, Saudi Arabia, Iran, Somalia, West Asia, and some of the most arid areas of the western part of the United States. Gypsids are on many segments of the landscape. Some of them have calcic or related horizons that overlie the gypsic horizon.
Aridisols, as their name implies, are soils in which water is not available to mesophytic plants for long periods. During most of the time when the soils are warm enough for plants to grow, soil water is held at potentials less than the permanent wilting point or has a content of soluble salts great enough to limit the growth of plants other than halophytes, or both. There is no period of 90 consecutive days when moisture is continuously available for plant growth. Because of an extreme imbalance between evapotranspiration and precipitation, many Aridisols contain salts. The dominant process is one of accumulation and concentration of weathering products. The accumulation of salts is the second most important constraint to land use.
For more information about soil classification in the UAE, visit:
vdocument.in/united-arab-emirates-keys-to-soil-taxonomy.h...
For more information about describing and sampling soils, visit:
www.nrcs.usda.gov/resources/guides-and-instructions/field...
or Chapter 3 of the Soil Survey manual:
www.nrcs.usda.gov/sites/default/files/2022-09/The-Soil-Su...
For additional information on "How to Use the Field Book for Describing and Sampling Soils" (video reference), visit:
www.youtube.com/watch?v=e_hQaXV7MpM