Topsoil Textural Class

Topsoil textural class refers to the simplified textural classes for 0–30cm used in the Soil Map of the World (FAO/Unesco, 1970-1980). Because of the scale of the map (1:5 million) only three simplified textural classes were used.

Coarse textured: sands, loamy sands and sandy loams with less than 18 percent clay and more than 65 percent sand.

Medium textured: sandy loams, loams, sandy clay loams, silt loams, silt, silty clay loams and clay loams with less than 35 % clay and less than 65 % sand; the sand fraction may be as high as 82 percent if a minimum of 18 percent of clay is present.

Fine textured: clays, silty clays, sandy clays, clay loams and silty clay loams with more than 35 percent clay.

Values are coded as follows: 0 = None 1 = Coarse 2 = Medium 3 = Fine

Data Citation: FAO/IIASA/ISRIC/ISS-CAS/JRC, 2012. Harmonized World Soil Database (version 1.21). FAO, Rome, Italy and IIASA, Laxenburg, Austria.

Data and Resources

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Additional Info

Field Value
Source https://app.mapx.org/static.html?views=MX-4M7VK-FIYE1-GW99Z&zoomToViews=true#JAAc6
Author UNEP/GRID-Geneva
Maintainer UNEP/GRID-Geneva
Last Updated December 7, 2022, 08:07 (UTC)
Created December 7, 2022, 08:07 (UTC)
GUID MX-4M7VK-FIYE1-GW99Z
Issued 2020-01-24 20:00:06
Language EN
Modified 2021-09-06 11:01:23
Publisher email info@mapx.org
Publisher name UNEP/GRID-Geneva
Theme Web Map
data_type geospatial
keywords_m49 WLD
projects_description NEAT+ Global
projects_id MX-WJO-FOV-NNB-1BN-SZN
projects_title NEAT+ Global
range_end_at_year 2021
range_start_at_year 2008
source_abstract Topsoil textural class refers to the simplified textural classes for 0–30cm used in the Soil Map of the World (FAO/Unesco, 1970-1980). Because of the scale of the map (1:5 million) only three simplified textural classes were used. Coarse textured: sands, loamy sands and sandy loams with less than 18 percent clay and more than 65 percent sand. Medium textured: sandy loams, loams, sandy clay loams, silt loams, silt, silty clay loams and clay loams with less than 35 % clay and less than 65 % sand; the sand fraction may be as high as 82 percent if a minimum of 18 percent of clay is present. Fine textured: clays, silty clays, sandy clays, clay loams and silty clay loams with more than 35 percent clay. Values are coded as follows: 0 = None 1 = Coarse 2 = Medium 3 = Fine Data Citation: FAO/IIASA/ISRIC/ISS-CAS/JRC, 2012. Harmonized World Soil Database (version 1.21). FAO, Rome, Italy and IIASA, Laxenburg, Austria.
source_title Topsoil Textural Class
spatial WLD