Soil subgroup

Udortent 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 orderEntisolSoil without diagnostic horizons, or almost: recently deposited material (sand, alluvium) or on which the climate did not have time to act.
SuborderOrtentEntisol on material that is neither sandy nor alluvial: eroded slopes, rock, recent sediments.
Great groupUdortentWithin the Ortent suborder, it It is a humid climate (udic moisture regime).
SubgrouptípicoIt 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

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
Imperfect
Typical effective depth
400 cm

Where it is found

According to the 1:500.000 national map, it covers about 381.271 ha, spread over 12 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
Misiones317.273 ha
Chaco63.999 ha

Districts where it is most common

It also appears on the detailed maps of: Buenos Aires, Misiones.

How productive it is

Where it is the main soil of the map unit, the productivity index has a median of 10 (very low); half of the units fall between 10 and 14.

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 Udortent 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.

Misiones

A. Chafariz · El Ceibo · A. Veinticinco · San Ignacio

Buenos Aires

Las Parvas

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