umbrisol

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• Umbrisol — An Umbrisol is a type of soil. The Food and Agriculture Organization define the group as those having a thick, acid topsoil rich in organic matter. This soil type is dominant in north west Spain, parts of north west United States and in parts of… …   Wikipedia

• Umbrisol — ▪ FAO soil group  one of the 30 soil groups in the classification system of the Food and Agriculture Organization (FAO) (soil). Umbrisols are characterized by a surface layer that is rich in humus but not in calcium available to plants, owing to… …   Universalium

• World Reference Base — Die World Reference Base for Soil Resources (Abkürzung WRB) ist eine Bodenklassifikation, die als internationales Kommunikationsmittel für den Fachbereich Boden geschaffen wurde. Sie ist mehr oder weniger weltweit gültig, um Informationen über… …   Deutsch Wikipedia

• World Reference Base for Soil Resources — La World Reference Base for Soil Resources (WRB: acrónimo (en inglés) Base referencial mundial para recursos de suelos), es el estándar internacional taxonómico de sistema de Clasificación de suelos respaldado por la International Union of Soil… …   Wikipedia Español

• soil — soil1 soilless, adj. /soyl/, n. 1. the portion of the earth s surface consisting of disintegrated rock and humus. 2. a particular kind of earth: sandy soil. 3. the ground as producing vegetation or as cultivated for its crops: fertile soil. 4. a… …   Universalium

• FAO Soil Classification System — ▪ Table Soil classification system of the Food and Agriculture Organization   soil group  abbrevi ation defining  characteristics name derivation percent of Earth s land area See as table: Soils defined by parent material   Andosol AN volcanic… …   Universalium