|Research Sites in Northern Thailand: Bor Krai, Huai Bong, Mae Sa Mai|
Soils of NW-Thailand: (a) Major Soils: Acrisols, Alisols, Cambisols; (b) Minor Soils: Anthrosols, Ferralsols, Fluvisols, Gleysols, Leptsols, Luvisols, Plinthosols, Regosols, Technosols, Umbrisols; (c) Exotic Soils: Chernozems, Histosols, Stagnosols, Vertisols
Umbrisols - Soils of NW-Thailand
Umbrisols are characterized by organic matter enriched topsoil material, and are mostly associated with Cambisols. They occur at highest elevations with a precipitation of more than 2000 mm a-1 on low permeable rocks (mainly granite and gneiss, and/or on lower and concave slopes, depressions and valleys controlled by colluvial deposits.
|copyright Ulrich Schuler 2008-2010|