soil.classes {GSIF}R Documentation

Soil classification tables

Description

Standard soil classification tables for the United States Department of Agriculture (USDA) and IUSS / FAO World Reference Base (WRB) classification systems, including the tables used to correlate various soil classification systems.

Usage

data(soil.classes)

Format

Contains a list of tables:

Canadian

data frame; Canadian soil classification system (Soil Classification Working Group, 1998)

FAO1990.WRB

data frame; FAO 1990 (FAO-Unesco Soil Classification System) system to WRB (2006)

USDA_GreatGroups

data frame; list of USDA Great Groups (USDA, 2010)

WRB_versions

data frame; correlation between various FAO/WRB versions (Krasilnikov et al. 2009)

FAO1974.WRB

data frame; correlation FAO 1974 system to WRB (IUSS Working Group WRB, 2006)

USDA.WRB

data frame; correlation USDA system to WRB system

Soils_World

data frame; referent soil profiles of the world (van Baren and Lof, 1987)

Note

Some of the original tables from the literature have been adjusted / updated by the author. Correlation between various national and international systems often leads to multiple soil classes being possible equivalents. These are separated in tables using "/" symbol e.g. Dark Gray Chernozem = Boralfic Boroll / Albolls. Some national soil classification systems contain classes which are completely unique and hence most likely can not be correlated to any class in the target system.

Author(s)

Tomislav Hengl

References

Examples

data(soil.classes)
soil.classes$USDA_GreatGroups[1,]
DGC <- which(soil.classes$Canadian$CSSC_Great_Groups=="Dark Gray Chernozem")
soil.classes$Canadian[DGC,]

[Package GSIF version 0.5-4 Index]