Soil subgroup

Torrifluvent 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.
SuborderFluventEntisol formed by layers of alluvium left by a river when it overflows; organic matter rises and falls with each layer.
Great groupTorrifluventWithin the Fluvent suborder, it It has an arid climate (torric 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
Sandy
Most common drainage
Well drained
Typical effective depth
80 cm

Where it is found

According to the 1:500.000 national map, it covers about 6.996.258 ha, spread over 92 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
Mendoza2.357.624 ha
Río Negro981.599 ha
San Juan885.010 ha
Chubut623.575 ha
Catamarca426.845 ha
San Luis311.445 ha
Santa Cruz277.417 ha
La Rioja276.387 ha
Santiago del Estero234.116 ha
Neuquén198.021 ha

Districts where it is most common

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

How productive it is

Where it is the main soil of the map unit, the productivity index has a median of 20 (low); half of the units fall between 19 and 43.

Land capability

VII

class VII: 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.

Other Torrifluvent subgroups

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