Soil great group
Haplacuent
Of 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..
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.. |
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
- 50 cm
Where it is found
According to the 1:500.000 national map, it covers about 1.223.452 ha, spread over 38 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 | 510.517 ha |
| Entre Ríos | 272.967 ha |
| Chaco | 234.979 ha |
| Santa Cruz | 78.416 ha |
| Buenos Aires | 60.617 ha |
| Neuquén | 44.165 ha |
| Córdoba | 11.091 ha |
| Santiago del Estero | 6.772 ha |
| Salta | 3.928 ha |
Districts where it is most common
- Pilcomayo · Formosa
- Islas del Ibicuy · Entre Ríos
- Tapenagá · Chaco
- Patiño · Formosa
- General Güemes · Chaco
- Pilagás · Formosa
- Güer Aike · Santa Cruz
- Pirané · Formosa
- Uruguay · Entre Ríos
- Zárate · Buenos Aires
- San Fernando · Buenos Aires
- Collón Curá · Neuquén
- Nogoyá · Entre Ríos
- La Paz · Entre Ríos
- Libertador General San Martín · Chaco
- Gualeguaychú · Entre Ríos
- Tala · Entre Ríos
- Gualeguay · Entre Ríos
- Formosa · Formosa
- Federación · Entre Ríos
It also appears on the detailed maps of: Entre Ríos, Santiago del Estero.
How productive it is
Where it is the main soil of the map unit, the productivity index has a median of 8 (very low); half of the units fall between 5 and 10.
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
- Haplacuent típico
- Haplacuent aérico
- Haplacuent hístico
- Haplacuent mólico
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
Arroyo Martínez · El Guasuncho · San José · Don Matías · Isla Don Alberto · Paso Alonso · La Unión · La Totora · La Escondida · Arroyo San Julián
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)