[Parameters: Topic='LAND SURFACE', Term='SOILS', Variable_Level_1='CALCIUM']
SOTER-based soil parameter estimates for Central Africa - DR of Congo, Burundi and Rwanda (ver. 1.0)Entry ID: ISRIC_SOTWIScaf
Abstract: This harmonized set of soil parameter estimates for Central Africa, comprising Burundi, the Democratic Republic of the Congo and Rwanda, was derived from the Soil and Terrain Database for Central Africa (SOTERCAF ver. 1.0) and the ISRIC-WISE soil profile database, using standardized taxonomy-based pedotransfer (taxotransfer) procedures.
The land surface of Central Africa, comprising ... some 2.4 million km2, has been characterized using 244 unique SOTER units, corresponding with 504 polygons. Each SOTER unit may consist of up to 6 soil components; each of these has been characterized by a representative profile. The main soil units mapped for the region have been characterized using 167 real profiles, selected by soil experts as being regionally representative for these units. The associated soil analytical data have been derived from soil survey reports.
Gaps in the measured soil data have been filled using a scheme of using a step-wise procedure that uses taxotransfer rules. These rules were developed using some 5672 soil profiles, held in the ISRIC-WISE database, having similar FAO soil unit names as those reported in the primary SOTERCAF database.
Parameter estimates are presented by soil unit for fixed depth intervals of 0.2 m to 1 m depth for: organic carbon, total nitrogen, C/N ratio, pH(H2O), CECsoil, CECclay, base saturation, effective CEC, aluminium saturation, CaCO3 content, gypsum content, exchangeable sodium percentage (ESP), electrical conductivity of saturated paste (ECe), bulk density, content of sand, silt and clay, content of coarse fragments (> 2 mm), and available water capacity (-33 kPa to -1.5 MPa). These attributes have been identified as being useful for agro-ecological zoning, land evaluation, crop growth simulation, modelling of soil carbon stocks and change, and analyses of global environmental change.
The current parameter estimates should be seen as best estimates based on the current selection of soil profiles and data clustering procedure. Taxotransfer rules have been flagged to provide an indication of the possible confidence in the derived data.
Data Set Citation
Dataset Originator/Creator: Niels H. Batjes
Dataset Title: SOTER-based soil parameter estimates for Central Africa - DR of Congo, Burundi and Rwanda (ver. 1.0)
Dataset Release Date: 2007-05-16
Dataset Release Place: Wageningen
Dataset Publisher: ISRIC - World Soil Information
Version: ver. 1.0
Data Presentation Form: ArcGis 9.x and MSAccess tables (zipped)
Other Citation Details: http://www.isric.nl/isric/Webdocs/Docs/ISRIC_Report_2007_02.pdfOnline Resource: http://www.isric.org/sites/all/modules/pubdlcnt/pubdlcnt.php?file=h...
Start Date: 1950-01-01Stop Date: 2002-12-31
Horizontal Resolution Range: 10 km - < 50 km or approximately .09 degree - < .5 degree
AGRICULTURE > SOILS > CALCIUM
AGRICULTURE > SOILS > CARBON
AGRICULTURE > SOILS > CATION EXCHANGE CAPACITY
AGRICULTURE > SOILS > ELECTRICAL CONDUCTIVITY
AGRICULTURE > SOILS > NITROGEN
AGRICULTURE > SOILS > ORGANIC MATTER
AGRICULTURE > SOILS > SOIL SALINITY/SOIL SODICITY
AGRICULTURE > SOILS > SOIL BULK DENSITY
AGRICULTURE > SOILS > SOIL CLASSIFICATION
AGRICULTURE > SOILS > SOIL DEPTH
AGRICULTURE > SOILS > SOIL HORIZONS/PROFILE
AGRICULTURE > SOILS > SOIL PH
AGRICULTURE > SOILS > SOIL TEXTURE
AGRICULTURE > SOILS > SOIL WATER HOLDING CAPACITY
AGRICULTURE > SOILS
LAND SURFACE > SOILS > CALCIUM
LAND SURFACE > SOILS > CARBON
LAND SURFACE > SOILS > CATION EXCHANGE CAPACITY
LAND SURFACE > SOILS > ELECTRICAL CONDUCTIVITY
LAND SURFACE > SOILS > NITROGEN
LAND SURFACE > SOILS > ORGANIC MATTER
LAND SURFACE > SOILS > SOIL SALINITY/SOIL SODICITY
LAND SURFACE > SOILS > SOIL BULK DENSITY
LAND SURFACE > SOILS > SOIL CLASSIFICATION
LAND SURFACE > SOILS > SOIL DEPTH
LAND SURFACE > SOILS > SOIL HORIZONS/PROFILE
LAND SURFACE > SOILS > SOIL PH
LAND SURFACE > SOILS > SOIL TEXTURE
LAND SURFACE > SOILS > SOIL WATER HOLDING CAPACITY
LAND SURFACE > SOILS
Quality The data set's lineage is described in:
Batjes NH 2007. SOTER-based soil parameter estimates for Central Africa - DM of Congo, Burundi and Rwanda
(SOTWIScaf, version 1.0). Report 2007/02 , ISRIC - World Soil Information, Wageningen (with data set; http://www.isric.org/)
Access Constraints ISRIC kindly requests that you send us two reprints of any publication that uses data received from ISRIC World Soil Information. This will help us to determine the type and level of use of the data we distribute.
Use Constraints Materials developed by ISRIC are copyrighted, all rights reserved. Reproduction and dissemination of such materials for educational or non-commercial purposes are authorized without any prior written permission from the copyright holders provided the source is fully acknowledged. Reproduction of materials for resale or other commercial purposes is prohibited without prior written permission of the ... copyright holders. Applications for such permission should be addressed to: Director, ISRIC - World Soil Information, PO Box 353, 6700 AJ Wageningen, the Netherlands or by e-mail to firstname.lastname@example.org.
ISRIC requests you to acknowledge use of our data; this will allow us to gauge the interest and usefulness of our services. Please refer to the dataset documentation for suggested form of acknowledgement and correct citation.
Data Set Progress
Email: niels.batjes at wur.nl
ISRIC - World Soil Information (World Data Center for Soils) P.O. Box 353
Postal Code: 6700 AJ
Country: The Netherlands
Batjes NH 2007. SOTER-based soil parameter estimates for Central Africa - DR of Congo, Burundi and Rwanda(SOTWIScaf, version 1.0). Report 2007/02, ISRIC - World Soil Information, Wageningen (http://www.isric.org/)
Batjes NH, Al-Adamat R, Bhattacharyya T, Bernoux M, Cerri CEP, Gicheru P, Kamoni P, Milne E, Pal DK and Rawajfih Z 2007. Preparation of consistent soil data sets for SOC ... modelling purposes: secondary SOTER data sets for four case study areas. Agriculture, Ecosystems and Environment 112, 26-34
FAO, ISRIC and UG 2007. Soil and terrain database for central Africa (Burundi and Rwanda 1:1 million scale; Democratic Republic of the Congo 1:2 million scale). Land and Water Digital Media Series 33, Food and Agricultural Organization of the United Nations, ISRIC - World Soil Information and Universiteit Gent, Rome
Van Engelen VWP, Verdoodt A, Dijkshoorn JA and Van Ranst E 2006. Soil and Terrain Database of Central Africa (DR of Congo, Burundi and Rwanda). Report 2006/07, ISRIC - World Soil Information, Wageningen (http://www.isric.org/Webdocs/Docs/ISRIC_Report_2006_07.pdf)
Extended Metadata Properties
(Click to view more)
Creation and Review Dates
DIF Creation Date: 2007-07-05
Last DIF Revision Date: 2013-10-09