Soil great group

Hapludalf

Of the Udalf 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 the name says

Soil Taxonomy names are built from parts, and each part says something about the soil. From general to specific:

Taxonomic orderAlfisolSoil with a clay accumulation horizon (argillic or natric) and good base saturation, but without the thick, dark surface of a Molisol.
SuborderUdalfAlfisol humid climate (udic moisture regime).
Great groupHapludalfWithin the Udalf 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

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
Silt loam
Most common drainage
Moderate
Typical effective depth
80 cm

Where it is found

According to the 1:500.000 national map, it covers about 429.838 ha, spread over 25 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.

ProvinceArea
Corrientes244.188 ha
Salta88.761 ha
Tucumán47.093 ha
Santiago del Estero33.465 ha
Chaco8.240 ha
Jujuy8.089 ha

Districts where it is most common

It also appears on the detailed maps of: Misiones, Santiago del Estero.

How productive it is

Where it is the main soil of the map unit, the productivity index has a median of 24 (low); half of the units fall between 22 and 41.

Land capability

V

class V: 100%

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

  • Hapludalf vértico
  • Hapludalf típico
  • Hapludalf álbico
  • Hapludalf últico
  • Hapludalf lítico
  • Hapludalf psaméntico
  • Hapludalf arénico
  • Hapludalf mólico
  • Hapludalf glósico

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

17 de Agosto · El Molino

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