5.01a (470.53 ha Index 5)
This is a group of small territorial extension, with areas located in the east of the Department of Colonia (Sierra de Mal Coat and northwest of San Jose (Sierra de Muhammad). The relief is strongly undulating and the soils are Subeutric (sometimes District) Haplic Brunosols, deep (more than 50 cm.), moderately deep (30-50 cm.) and superficial (less than 30 cm.) of brown to reddish brown color. , gravelly loam to sandy gravelly loam, with medium to low fertility and variable internal drainage (Regosols). The main limitation is the rocky outcrops that cover more than 40% of the area. They are grainy acidic rocks (granites) and the outcrops are rounded and large, among which there may be mountainous shrubby vegetation. The use is pastoral limited by rockiness. This group corresponds to the Sierra de Mahoma unit on the 1:1.000.000 (DSF) scale chart.
5.01b (61.79 ha Index 61)
Selected Soil Type: 5.01b The relief is strongly undulating and the soils are Subeutric (sometimes District) Haplic Brunosols, deep (more than 50 cm.), moderately deep (30-50 cm.) and superficial (less than 30 cm. ), brown to reddish brown in color, gravelly loam to sandy gravelly loam, with medium to low fertility and variable internal drainage (Regosols). It presents outcrops with 15 to 35% of the area covered. It is located in areas of small extension in the Departments. of San Jose, Flores y Colonia. This group also includes the steep slopes with high rockiness existing in the Cerros de San Juan (Department of Colonia). This group is part of the Sierra de Mahoma unit and occupies small areas in the San Gabriel-Guaycuru and Andresito units on the map at a scale of 1:1.000.000 (DSF).
5.02b (2.62 ha Index 88)
It is the most important group, since it occupies more than 80% of the lands in this subzone. It exists repeatedly in the Departments. of Florida and in the Department of Flores (Tips of the San Jose) and in the rest of the region defined for zone 5. The relief is undulating and strongly undulating, with modal slopes of 5 to 7%. The geological material corresponds to variable lithologies of pre-Devonian rocks, such as granites, migmatites, schistose metamorphic rocks (around Rosario), etc. The soils are moderately deep and superficial Subeutric Haplic Brunosols (moderately deep Brown Grasslands and Regosols), to which Inceptisole (Lithosols) are associated, sometimes very superficial. The upper horizon is brown and reddish brown, sometimes yellowish brown, with a loamy texture, gravelly loam or sandy loam with abundant gravel, fertility is medium, sometimes low. The rockiness is moderate and varies between 2 to 10% of the area with outcrops. Throughout the area there may be narrow lowlands, associated with drainage routes of little importance, which contain hydromorphic Luvic Gleysols (Humic Gley) and Typical Eutric or Luvic Brunosols (Black Prairies and Maximal Brown Prairies), which contain very good summer pastures. The use is pastoral. This group corresponds to the San Gabriel-Guaycuru unit on the 1:1.000.000 (DSF) scale chart.
