Soil subgroup
Haploborol fluvéntico
The organic matter does not go down little by little with depth but rather goes up and down: it is made up of layers of alluvium.
Haploborol 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 Haplocriol.
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 | Haploborol | Within the Borol suborder, it It is the simplest of the suborder: it does not have a clay horizon or any other feature that places it in a more specific group.. |
| Subgroup | fluvéntico | The organic matter does not go down little by little with depth but rather goes up and down: it is made up of layers of alluvium. |
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
- Loamy sand
- Most common drainage
- Moderate
- Typical effective depth
- 110 cm
Where it is found
According to the 1:500.000 national map, it covers about 630.567 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 |
|---|---|
| Santa Cruz | 630.567 ha |
Districts where it is most common
Other Haploborol subgroups
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)