Soil great group
Cromudert
Of the Udert suborder; it has lighter or brown colors on top.
Cromudert 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 Hapludert.
What the name says
Soil Taxonomy names are built from parts, and each part says something about the soil. From general to specific:
| Taxonomic order | Vertisol | Soil very clayey, with clays that swell when wet and contract when dry: when dry it opens wide and deep cracks, and when wet the layers slide against each other leaving slickensides. |
|---|---|---|
| Suborder | Udert | Vertisol humid climate: cracks open for a short time each year. |
| Great group | Cromudert | Within the Udert suborder, it has lighter or brown colors on top. |
What it means for farming
Fertile and with a lot of water retained, but difficult: they become waterlogged, when wet they become sticky and difficult to work with, and when dry they crack. They ask for tillage at the right time. They are the typical soil of much of Entre Ríos.
- Most common surface texture
- Clay
- Most common drainage
- Poor
- Typical effective depth
- 100 cm
Where it is found
According to the 1:500.000 national map, it covers about 150.344 ha, spread over 4 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.
| Province | Area |
|---|---|
| Buenos Aires | 150.344 ha |
Districts where it is most common
It also appears on the detailed maps of: Entre Ríos.
How productive it is
Where it is the main soil of the map unit, the productivity index has a median of 5 (very low); half of the units fall between 5 and 24.
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
- Cromudert argiudólico
- Cromudert árgico
- Cromudert acuéntico
- Cromudert ácuico
- Cromudert típico
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
Campo Nuevo · Febre · La Magdalena · Brasilera
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
- Soil Survey Staff. (2014). Claves para la Taxonomía de Suelos, 12.ª edición. USDA - Natural Resources Conservation Service. · Dominio público (USDA)
- INTA · Dominio público (carta 1:500.000)