Soil subgroup
Argiborol típico
It is the central concept of the great group: it has its features and none that brings it closer to another group.
Argiborol 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 Argicriol.
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 | Molisol | Soil with a thick, dark surface horizon rich in organic matter (the mollic epipedon), with more than half of its exchange capacity occupied by calcium, magnesium, potassium and sodium. It forms under grassland. |
|---|---|---|
| Suborder | Borol | Molisol cold climate. |
| Great group | Argiborol | Within the Borol suborder, it has a clay accumulation horizon (argillic): clay washed from the surface accumulated lower. |
| Subgroup | típico | It is the central concept of the great group: it has its features and none that brings it closer to another group. |
What it means for farming
They are the soils agricultural lands par excellence: the Pampas grassland formed them and most of Argentine agriculture is done on them. They retain water and nutrients; its limitation, when there is one, is below: clay, sodium, calcareous hardpan or drainage.
- Most common surface texture
- Sandy clay loam
- Most common drainage
- Moderate
- Typical effective depth
- 100 cm
Where it is found
According to the 1:500.000 national map, it covers about 506.407 ha, spread over 4 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 |
|---|---|
| Chubut | 290.722 ha |
| TIERRA DEL FUEGO E ISLAS MALVINAS | 215.685 ha |
Districts where it is most common
Soils it shares map units with
Several soils share each map unit. These are the ones most often found alongside this one: on a property, you will likely find them in the nearby low ground or on the next rise.
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)