Soil subgroup

Fluvacuent 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.
SuborderAcuentEntisol with excess water: saturated near the surface, with redox depletions.
Great groupFluvacuentWithin the Acuent suborder, it It is made up of layers of alluvium.
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 loam
Most common drainage
Poor
Typical effective depth
100 cm

Where it is found

According to the 1:500.000 national map, it covers about 336.177 ha, spread over 10 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
Buenos Aires103.744 ha
Corrientes88.943 ha
Mendoza67.077 ha
Santiago del Estero51.124 ha
Córdoba20.775 ha
Río Negro2.958 ha
Tucumán1.557 ha

Districts where it is most common

It also appears on the detailed maps of: Buenos Aires, Entre Ríos, Salta, Santiago del Estero.

How productive it is

Where it is the main soil of the map unit, the productivity index has a median of 36 (low); half of the units fall between 25 and 36.

Land capability

V
VII

class V: 50% · class VII: 50%

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.

Entre Ríos

Arroyo Verde

Buenos Aires

Atalaya · El Algarrobo

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