Soils are usually classified according to different criteria, depending on the use they are put to. Thus if an agronomic interest is pursued, and we are seeking to learn about the soil’s productive capacity, the soil will be classified as edaphologic, according to its physicochemical characteristics.
If, on the other hand, we are seeking to learn about its behavior as a support for different building structures, its use will be geotechnical, and the classification used will be based on its mechanical properties and hydraulic reactions. Soil can also be used as a raw material to make bricks or roads. These uses are based on the properties of the sediments.
The soils of the Undulating Pampas, where the AMBA is situated, are characterized by their fertility and the ease with which they can be farmed.
These soils, classified as “Mollisols” from a "taxonomic"
point of view, developed in the "pampean loess", have a limy texture and a mineralogical composition rich in nutrients.
Undoubtedly these soil characteristics, together with the weather conditions and flat relief , make up a combination with great agricultural potential and have been the principal factor to have influenced the economic development of this part of Argentina.
Large areas
In the area that the AABA encompasses at least three regions of distinctive
morphological characteristics can be identified. These are reflected in the
predominant soil types.
The first region includes the area near the Paraná
River and the Río de la Plata. Its southern border could be set at
the Matanza River, and its border to the west is the watershed between the
Paraná and Salado rivers. This region is characterized by topographical
variations and a definite drainage network, which reflect a considerable morphogenetic
potential. The usual geoforms (relief) are hillocks with a flat convex dorsum
. At the mouths of the tributaries, the hillocks are lobe-shaped and convex,
and their slopes only exceptionally reach 4%.
The second region, to the west of the preceding one, is situated
in the districts of Lobos, Navarro and Suipacha. It is characterized by the
gentleness of its topography and has a very low gradient (0.5%), which determines
a very low morphogenetic potential. It does not have a definite drainage network
and water courses are scarce. In the plains there are irregularly shaped gently
concave depressions of varying sizes, where rainwater accumulates.
The third area is situated to the south of the Matanzas River, which are known
as the Low Undulating Pampas.
