Soil great group
Durortid
Of the Ortid suborder; it has a duripan: a horizon cemented by silica.
Durortid is a name from the 1975 taxonomy, which many INTA soil survey maps were made with. The current edition no longer has this group: today it would be classified as Haplodurid.
What the name says
Soil Taxonomy names are built from parts, and each part says something about the soil. From general to specific:
| Taxonomic order | Aridisol | Soil arid climate: water is lacking most of the year and the profile accumulates what the rain cannot wash away (carbonates, gypsum, salts) or clay from more humid times. |
|---|---|---|
| Suborder | Ortid | Aridisol without clay horizon. |
| Great group | Durortid | Within the Ortid suborder, it has a duripan: a horizon cemented by silica. |
What it means for farming
Without irrigation there is no agriculture: they are soils of native woodland, extensive grazing or, with water, irrigated oases (Mendoza, San Juan, the valleys of the NOA).
Where it is found
According to the 1:500.000 national map, it covers about 78.301 ha, spread over 2 districts.
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National map units that list it. The scale is 1:500.000: good for seeing the region, not a single property.
| Province | Area |
|---|---|
| La Pampa | 78.301 ha |
Districts where it is most common
Subgroups on the maps
- Durortid típico
The definitions are a plain-language summary of the USDA Keys to Soil Taxonomy. The formal definition includes thickness, color and percentage thresholds that are left out here.
Sources
- Soil Survey Staff. (2014). Claves para la Taxonomía de Suelos, 12.ª edición. USDA - Natural Resources Conservation Service. · Dominio público (USDA)
- INTA · Dominio público (carta 1:500.000)