Soil great group
Ustocrept
Of the Ocrept suborder; it It has a subhumid to semiarid climate (ustic moisture regime).
Ustocrept 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 Haplustept.
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 | Inceptisol | Soil young, with some development below the surface (a cambic horizon) but without the clay accumulation or dark surface that would define other orders. |
|---|---|---|
| Suborder | Ocrept | Inceptisol with a clear surface and poor in organic matter (ochric epipedon). |
| Great group | Ustocrept | Within the Ocrept suborder, it It has a subhumid to semiarid climate (ustic moisture regime). |
What it means for farming
Intermediate aptitude and very dependent on location. In Argentina there are many Acueptes: Inceptisoles with excess water, often saline or sodic.
- Most common surface texture
- Loam
- Most common drainage
- Moderate
- Typical effective depth
- 120 cm
Where it is found
According to the 1:500.000 national map, it covers about 813.211 ha, spread over 17 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 |
|---|---|
| Chaco | 721.841 ha |
| Salta | 80.529 ha |
| Jujuy | 10.841 ha |
Districts where it is most common
- Independencia · Chaco
- Maipú · Chaco
- Cerrillos · Salta
- Almirante Brown · Chaco
- O'Higgins · Chaco
- General Güemes · Chaco
- Quitilipi · Chaco
- Chicoana · Salta
- Comandante Fernández · Chaco
- Libertador General San Martín · Chaco
- General Belgrano · Chaco
- Yavi · Jujuy
- Los Andes · Salta
- Santa Catalina · Jujuy
- La Poma · Salta
- Rinconada · Jujuy
- Cochinoca · Jujuy
It also appears on the detailed maps of: Salta.
How productive it is
Where it is the main soil of the map unit, the productivity index has a median of 60 (Well); half of the units fall between 50 and 68.
Land capability
class I: 40% · class II: 42% · class III: 2% · class IV: 10% · class V: 6%
Taken from the maps that include this data. A map unit with several soils has a single index, and it is only attributed to the dominant soil.
Subgroups on the maps
- Ustocrept údico
- Ustocrept fluvéntico
- Ustocrept 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)