Soil subgroup
Haplacuent aérico
Being a soil with excess water, the upper part is better aerated than in the typical one: fewer gray colors.
Haplacuent 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 Epiacuent or Endoacuent.
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 | Entisol | Soil without diagnostic horizons, or almost: recently deposited material (sand, alluvium) or on which the climate did not have time to act. |
|---|---|---|
| Suborder | Acuent | Entisol with excess water: saturated near the surface, with redox depletions. |
| Great group | Haplacuent | Within the Acuent 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 | aérico | Being a soil with excess water, the upper part is better aerated than in the typical one: fewer gray colors. |
What it means for farming
Very variable. The sandy ones (Psamentes) retain little water and blow away; alluvial ones (Fluventes) can be good but they flood; the shallow ones on rock (lithic) are barely useful for grazing.
- Most common surface texture
- Silt loam
- Most common drainage
- Poor
- Typical effective depth
- 25 cm
Where it is found
According to the 1:500.000 national map, it covers about 834.382 ha, spread over 14 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 |
|---|---|
| Formosa | 501.956 ha |
| Chaco | 141.140 ha |
| Entre Ríos | 130.670 ha |
| Buenos Aires | 60.617 ha |
Districts where it is most common
- Pilcomayo · Formosa
- Islas del Ibicuy · Entre Ríos
- Tapenagá · Chaco
- Patiño · Formosa
- Pilagás · Formosa
- Pirané · Formosa
- Zárate · Buenos Aires
- General Güemes · Chaco
- San Fernando · Buenos Aires
- Formosa · Formosa
- Bermejo · Formosa
- Campana · Buenos Aires
- Tigre · Buenos Aires
- La Plata · Buenos Aires
It also appears on the detailed maps of: Entre Ríos.
How productive it is
Where it is the main soil of the map unit, the productivity index has a median of 5 (very low); half of the units fall between 5 and 12.
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.
Other Haplacuent subgroups
Soil series
Series are the specific soils, named after places, that detailed maps describe under this name. Two properties with the same series have the same soil.
Entre Ríos
Isla Don Alberto · La Totora · Arroyo San Julián
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)