Udult

Udult

[′üd‚əlt]
(geology)
A suborder of the soil order Ultisol; organic-carbon content is low, argillic horizons are reddish or yellowish; formed in a udic moisture regime.
References in periodicals archive ?
Soils are classified in the Ultisol order and Udult suborder according to the USDA soil classification system [20].
Soils at Misiones are typified as Rhodudults and the one from Corrientes as an Udult.
This soil is a sandstone-derived sandy haplic acrisol (or udult ultisol, see Davies and Becker 1996), with a high sand content, and is generally nutrient poor (Baillie et al.
The low-mountain forestland (LF) is now covered with secondary shallow-rooted coniferous forests (altitude <800m a.s.1.), such as Cunninghamia lanceolata, Pinns massoniana, Cupressus funebris, and Pinns armandii (Xie and Chen 1998), and the local soils are classified as Udults (Soil Survey Staff 1992).
The soil used in these experiments was an ultisols sub-order udults (NRCS, 2013).
1) and its Ultisol Udults soils possess a low base saturation, which requires farmers to abandon fields after a few years of production (Soil Survey Staff, 1999).
The dominant suborders of Ultisols are Aquults, Humults, Udults, Ustults, and Xerults (Table 3-5).
Characters of three udults and their relevance to the composition and structure of virgin rain forest of Amazonian Ecuador.
Soils are primarily well drained, clayey Udults formed in residuum of granite, gneiss, schist, or Carolina Slate.