Soil great group

Rodudalf

Of the Udalf suborder; it It has a dark red clay horizon.

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 groupRodudalfWithin the Udalf suborder, it It has a dark red clay horizon.

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
Sandy loam
Most common drainage
Well drained
Typical effective depth
400 cm

Where it is found

According to the 1:500.000 national map, it covers about 401.443 ha, spread over 16 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
Misiones327.511 ha
Corrientes73.933 ha

Districts where it is most common

It also appears on the detailed maps of: Misiones.

How productive it is

Where it is the main soil of the map unit, the productivity index has a median of 17 (very low); half of the units fall between 17 and 17.

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.

Misiones

Paranai-Guazu

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