Soil subgroup
Rodudalf típico
It is the central concept of the great group: it has its features and none that brings it closer to another group.
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 | Alfisol | Soil with a clay accumulation horizon (argillic or natric) and good base saturation, but without the thick, dark surface of a Molisol. |
|---|---|---|
| Suborder | Udalf | Alfisol humid climate (udic moisture regime). |
| Great group | Rodudalf | Within the Udalf suborder, it It has a dark red clay horizon. |
| 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
Acceptable fertility, but the surface layer is thinner and poor in organic matter. In the Pampas region many Alfisoles are sodic or floodable (Natracualfes) and are left for livestock.
- Most common surface texture
- Sandy loam
- Most common drainage
- Well drained
- Typical effective depth
- 400 cm
Where it is found
According to the 1:500.000 national map, it covers about 398.572 ha, spread over 16 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 |
|---|---|
| Misiones | 324.639 ha |
| Corrientes | 73.933 ha |
Districts where it is most common
- Libertador General San Martín · Misiones
- San Ignacio · Misiones
- Monte Caseros · Corrientes
- Eldorado · Misiones
- Guaraní · Misiones
- General Manuel Belgrano · Misiones
- Paso de los Libres · Corrientes
- San Pedro · Misiones
- Montecarlo · Misiones
- Leandro N. Alem · Misiones
- Oberá · Misiones
- Cainguás · Misiones
- 25 de Mayo · Misiones
- Concepción · Misiones
- Iguazú · Misiones
- Candelaria · Misiones
It also appears on the detailed maps of: Misiones.
How productive it is
Where it is the main soil of the map unit, the productivity index has a median of 17 (very low); half of the units fall between 17 and 17.
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.
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.
Misiones
Paranai-Guazu
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)