Soil great group

Haplacuol

Of the Acuol 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..

Haplacuol is a name from the 1975 taxonomy, which many INTA soil survey maps were made with. The current edition no longer has this group: today it would be classified as Endoacuol.

What the name says

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

Taxonomic orderMolisolSoil with a thick, dark surface horizon rich in organic matter (the mollic epipedon), with more than half of its exchange capacity occupied by calcium, magnesium, potassium and sodium. It forms under grassland.
SuborderAcuolMolisol with excess water: saturated near the surface for part of the year, with redox depletions (gray, mottles) in the profile.
Great groupHaplacuolWithin the Acuol 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

They are the soils agricultural lands par excellence: the Pampas grassland formed them and most of Argentine agriculture is done on them. They retain water and nutrients; its limitation, when there is one, is below: clay, sodium, calcareous hardpan or drainage.

Most common surface texture
Silty clay
Most common drainage
Very poor
Typical effective depth
100 cm

Where it is found

According to the 1:500.000 national map, it covers about 1.254.855 ha, spread over 31 districts.

Loading map…

National map units that list it. The scale is 1:500.000: good for seeing the region, not a single property.

ProvinceArea
Entre Ríos574.860 ha
Chubut243.455 ha
Chaco178.100 ha
Buenos Aires101.089 ha
Neuquén87.004 ha
Santa Fe61.252 ha
Córdoba9.095 ha

Districts where it is most common

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

How productive it is

Where it is the main soil of the map unit, the productivity index has a median of 19 (very low); half of the units fall between 12 and 20.

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

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

Isla Don Antonio · Potrero Los Sauces · El Refugio · El Rosedal · El Rosadal · Estancia La Peregrina · Estancia San Juán · El Pato · Potrero Cinco

Buenos Aires

Ostende · Laguna Blanca

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