Soil great group
Haploxerol
Of the Xerol 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 the name says
Soil Taxonomy names are built from parts, and each part says something about the soil. From general to specific:
| Taxonomic order | Molisol | Soil 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. |
|---|---|---|
| Suborder | Xerol | Molisol Mediterranean climate (xeric moisture regime): it rains in winter and summer is dry. |
| Great group | Haploxerol | Within the Xerol 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
- Sandy loam
- Most common drainage
- Excessive
- Typical effective depth
- 115 cm
Where it is found
According to the 1:500.000 national map, it covers about 1.237.290 ha, spread over 20 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 |
|---|---|
| Chubut | 900.629 ha |
| Neuquén | 244.015 ha |
| Río Negro | 87.031 ha |
| Santa Cruz | 5.614 ha |
Districts where it is most common
- Escalante · Chubut
- Florentino Ameghino · Chubut
- Sarmiento · Chubut
- Cushamen · Chubut
- Paso de Indios · Chubut
- Huiliches · Neuquén
- Telsen · Chubut
- El Cuy · Río Negro
- Gastre · Chubut
- Minas · Neuquén
- Chos Malal · Neuquén
- Lácar · Neuquén
- Aluminé · Neuquén
- Catán Lil · Neuquén
- 25 de Mayo · Río Negro
- Pehuenches · Neuquén
- Deseado · Santa Cruz
- Ñorquín · Neuquén
- Picunches · Neuquén
- Loncopué · Neuquén
How productive it is
Where it is the main soil of the map unit, the productivity index has a median of 39.5 (low); half of the units fall between 14 and 61.
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
- Haploxerol éntico
- Haploxerol arídico
- Haploxerol lítico
- Haploxerol cálcico
- Haploxerol cumúlico
- Haploxerol tapto árgico
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)