Udoll

Udoll

[′üd‚ȯl]
(geology)
A suborder of the Mollisol soil order; found in humid, temperate, and warm regions where maximum rainfall comes during growing season; has thick, very dark A horizons, brown B horizons, and paler C horizons.
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References in periodicals archive ?
[19] quienes afirman que la aplicacion a largo plazo de fertilizantes quimicos sobre un suelo Udoll no induce cambios significativos sobre la biomasa y la diversidad microbiana.
6 for USA Udoll (43% clay) (Larson and Padilla 1990) and Brazil Humic Ferralsol (a Ferralsol is the FAO equivalent of an Oxisol) (82% clay) (van den Berg et al.
8 have much smaller amounts of interaggregate pores than do the Oxisols [USA Udoll; (Larson and Padilla 1990), Brazil Ferralsol (van den Berg et al.
The soil climate is classified as mesic passing from Udoll to Ustoll (Van Wanbecke and Scoppa, 1980).
According to Geological Survey of Pakistan the mollisols (Udolls and Hapludolls) were formed over Mureeshales with mixed mineralogy comprising of dark reddish brown moist silty clay loam weak medium sub- angular blocky structure friable slightly sticky very plastic few very fine and very coarse and common fine medium and coarse roots many continues and distinct clay films on vertical faces of peds and in pores common continues moderately thick clay films in root channels and or pores thin organic coats in pore and or root channels.
In the United States the dominant suborders of Mollisols appear as sequential bands across the country reflecting the moisture regimes in which each Mollisol developed: Albolls, Aquolls, Cryolls, Rendolls, Udolls, Ustolls, and Xerolls (Table 3-5; Figure 3-13).
Potentillo rigoanae-Brachypodietum genuensis soils are to be included in theMollisols order, suborder Udolls, great group Hapludolls, subgroup entic Hapludolls (brown rendzina).
Soils in this MLRA are mainly Udolls and were generally formed on loess that ranges in thickness from approximately 25 m (82 ft) on the ridges to [less than] 5 m (16 ft) in the valleys.
Soils in the region are mainly Udolls and Orthents that are generally deep and range from medium to moderately fine-textured.