Typic Haplocalcid and landscape AE

A Typic Haplocalcid from the interior of the UAE.

 

Note: The dark clumps on the soil surface are road apples from the camels. While the term “road apples” may conjure up a pleasant image of apple trees growing by the side of a bucolic country road, the truth is in fact much uglier. This term is used in regional American slang to refer to manure. Written evidence suggests that people started referring to horse dung as road apples around the mid 20th century.

 

Haplocalcids are the Calcids that have a calcic horizon with its upper boundary within 100 cm of the soil surface. These soils do not have a duripan or an argillic, natric, or petrocalcic horizon within 100 cm of the soil surface. Some of the soils have a cambic horizon above the calcic horizon. Haplocalcids are extensive.

 

Calcids are the Aridisols with calcium carbonate that was in the parent materials or was added as dust, or both. Precipitation is insufficient to leach or even move the carbonates to great depths. The upper boundary of the calcic or petrocalcic horizon is normally within 50 cm of the soil surface. If the soils are irrigated and cultivated, micronutrient deficiencies are normal. These soils are extensive in the western part of the United States and in other arid regions of the world.

 

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...

 

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