Soil property estimates for the Upper Tana river catchment, Kenya, derived from SOTER and WISE (ver. 1.1)
Entry ID: SOTWIS_Upper_Tana_Kenya

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Summary
Abstract: This data set describes a harmonized set of soil property estimates for the Upper Tana river catchment, Kenya. The data set was derived from the 1:250 000 scale Soil and Terrain Database for the Upper Tana (SOTER_UT, ver. 1.1; Dijkshoorn et al. 2011) and the ISRIC-WISE soil profile database, using standardized taxonomy-based pedotransfer (taxotransfer) procedures.

The land surface of the Upper Tana, Kenya, covering some 18,900 km2, has been mapped in SOTER using 191 unique SOTER units. Each map unit may comprise of up to three different soil components. In so far as possible, each soil component has been characterized by a regionally representative profile, selected and classified by national soil experts. Conversely, in the absence of any measured legacy data, soil components were characterized using synthetic profiles for which only the FAO-Unesco (1988) classification is known.

Soil components in SOTER_UT have been characterized using 146 profiles consisting of 109 real and 37 so-called synthetic profiles. The latter were used to represent some 18% per cent of the study area. Comprehensive sets of measured attribute data are seldom available for most profiles (109) collated in SOTER_UT, as these were not considered in the source materials. Consequently, to permit modelling, gaps in the soil analytical data have been filled using consistent taxotransfer procedures. Modal soil property estimates necessary to populate the taxotransfer procedure were derived from statistical analyses of soil profiles held in the ISRIC-WISE database. The current taxotransfer procedure only considers profiles in WISE that: (a) have FAO soil unit names (43) identical to those mapped for the Upper Tana in SOTER, and (b) originate from regions having similar Köppen climate zones (n= 5745).

Property estimates are presented for 18 soil variables by soil unit for fixed depth intervals of 0.2 m to 1 m depth: organic carbon, total nitrogen, pH(H2O), CECsoil, CECclay, base saturation, effective CEC, aluminium saturation, CaCO3 content, gypsum content, exchangeable sodium percentage (ESP), electrical conductivity (ECe), bulk density, content of sand, silt and clay, content of coarse fragments (> 2 mm), and volumetric water content (-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 studies of global environmental change.

The soil property estimates can be linked to the spatial data (map), using GIS, through the unique SOTER-unit code; database applications should consider the full map unit composition and depth range.

Related URL
Link: VIEW RELATED INFORMATION
Description: View project page and download information(Last revised Feb. 2011)


Geographic Coverage
 N: 0.323 S: -1.168  E: 37.908  W: 37.463
 Min Altitude: 400  Max Altitude: 4500

Data Set Citation
Dataset Originator/Creator: Niels H. Batjes
Dataset Title: Soil property estimates for the Upper Tana river catchment, Kenya, derived from SOTER and WISE (ver. 1.1)
Dataset Release Date: 20110215
Dataset Release Place: Wageningen
Dataset Publisher: ISRIC - World Soil Information
Version: ver. 1.1
Data Presentation Form: ArcGis 9.x and MSAccess tables (zipped)
Other Citation Details: http://www.isric.org/isric/webdocs/docs/ISRIC_Report_2010_07b.pdf
Online Resource: http://www.isric.org/sites/all/modules/pubdlcnt/pubdlcnt.php?file=h...


Temporal Coverage
Start Date: 1975-01-01
Stop Date: 2010-04-01


Location Keywords
CONTINENT > AFRICA > EASTERN AFRICA > KENYA


Science Keywords
AGRICULTURE >SOILS >CALCIUM    [Definition]
AGRICULTURE >SOILS >CARBON    [Definition]
AGRICULTURE >SOILS >CATION EXCHANGE CAPACITY    [Definition]
AGRICULTURE >SOILS >ELECTRICAL CONDUCTIVITY    [Definition]
AGRICULTURE >SOILS >NITROGEN    [Definition]
AGRICULTURE >SOILS >ORGANIC MATTER    [Definition]
AGRICULTURE >SOILS >SOIL SALINITY/SOIL SODICITY    [Definition]
AGRICULTURE >SOILS >SOIL BULK DENSITY    [Definition]
AGRICULTURE >SOILS >SOIL CLASSIFICATION    [Definition]
AGRICULTURE >SOILS >SOIL DEPTH    [Definition]
AGRICULTURE >SOILS >SOIL HORIZONS/PROFILE    [Definition]
AGRICULTURE >SOILS >SOIL PH    [Definition]
AGRICULTURE >SOILS >SOIL TEXTURE    [Definition]
AGRICULTURE >SOILS >SOIL WATER HOLDING CAPACITY    [Definition]
AGRICULTURE >SOILS    [Definition]
LAND SURFACE >SOILS >CALCIUM    [Definition]
LAND SURFACE >SOILS >CARBON    [Definition]
LAND SURFACE >SOILS >CATION EXCHANGE CAPACITY    [Definition]
LAND SURFACE >SOILS >ELECTRICAL CONDUCTIVITY    [Definition]
LAND SURFACE >SOILS >NITROGEN    [Definition]
LAND SURFACE >SOILS >ORGANIC MATTER    [Definition]
LAND SURFACE >SOILS >SOIL SALINITY/SOIL SODICITY    [Definition]
LAND SURFACE >SOILS >SOIL BULK DENSITY    [Definition]
LAND SURFACE >SOILS >SOIL CLASSIFICATION    [Definition]
LAND SURFACE >SOILS >SOIL DEPTH    [Definition]
LAND SURFACE >SOILS >SOIL HORIZONS/PROFILE    [Definition]
LAND SURFACE >SOILS >SOIL PH    [Definition]
LAND SURFACE >SOILS >SOIL TEXTURE    [Definition]
LAND SURFACE >SOILS >SOIL WATER HOLDING CAPACITY    [Definition]
LAND SURFACE >SOILS    [Definition]


ISO Topic Category
ENVIRONMENT
IMAGERY/BASE MAPS/EARTH COVER


Project
SOTERPROGRAM >SOTER - Soil and Terrain Database Programme    [Information]


Quality
The data set's lineage is described in:

1) Batjes NH 2011. Soil property estimates for the Upper Tana river catchment, Kenya, derived from SOTER and WISE (ver. 1.1). Report 2010/07b, ISRIC – World Soil Information, Wageningen (41p. with data set) (http://www.isric.org/isric/webdocs/docs/ISRIC_Report_2010_07.pdf)

2) Dijkshoorn JA, Macharia P, Huting J, Maingi P and Njoroge C 2011. Soil and and terrain conditions for the Upper Tana river catchment, Kenya (ver. 1.1). Kenya Agricultural Research Institute (KARI) and ISRIC – World Soil Information, Wageningen (http://www.isric.org/isric/webdocs/docs/ISRIC_Report_2010_09b.pdf)


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 soil.isric@wur.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.


Keywords
secondary (derived) soil data
soil parameter estimates


Data Set Progress
COMPLETE


Originating Center
ISRIC - World Soil Information


Data Center
World Data Center for Soils, ISRIC - World Soil Information, Wageningen    [Information]
Data Center URL: http://www.isric.org
Dataset ID: ISRIC_Upper_Tana_Kenya

Data Center Personnel
Name: NIELS H. BATJES
Phone: +31-317-483735
Email: niels.batjes at wur.nl
Contact Address:
ISRIC - World Soil Information (World Data Center for Soils)
P.O. Box 353
City: Wageningen
Postal Code: 6700 AJ
Country: The Netherlands



Distribution
Distribution_Media: Download Zip file
Distribution_Size: 2.5 MB zipped
Distribution_Format: Argis 9.x and MS-Access
Fees: n/a


Personnel
NIELS H. BATJES
Role: INVESTIGATOR
Role: DIF AUTHOR
Phone: +31-317-483735
Email: niels.batjes at wur.nl
Contact Address:
ISRIC - World Soil Information (World Data Center for Soils)
P.O. Box 353
City: Wageningen
Postal Code: 6700 AJ
Country: The Netherlands


Publications/References
1) Batjes NH 2011. Soil property estimates for the Upper Tana river catchment, Kenya, derived from SOTER and WISE (ver. 1.1). Report 2010/07b, ISRIC – World Soil Information, Wageningen (vi + 37 p. with data set)(http://www.isric.org/isric/webdocs/docs/ISRIC_Report_2010_07b.pdf)

2) Dijkshoorn JA, Macharia P, Huting J, Maingi P and Njoroge C 2011. Soil and and terrain conditions for the Upper Tana river catchment, Kenya (Ver. 1.1), ISRIC Report 2010/09b, Kenya Agricultural Research Institute (KARI) and ISRIC – World Soil Information, Wageningen (http://www.isric.org/isric/webdocs/docs/ISRIC_Report_2010_09b.pdf), pp 35 + data set

3) Batjes NH 2010. Soil property estimates for the Upper Tana, Kenya, derived from SOTER and WISE (Ver. 1.0). Report 2010/07, ISRIC - World Soil Information, Wageningen (http://www.isric.org/isric/webdocs/docs/ISRIC_Report_2010_07.pdf)

4) Dijkshoorn JA, Macharia P, Huting J, Maingi P and Njoroge C 2010. Soil and and terrain conditions for the Upper Tana river catchment, Kenya, Kenya Agricultural Research Institute (KARI) and ISRIC – World Soil Information, Wageningen (http://www.isric.org/isric/webdocs/docs/ISRIC_Report_2010_09.pdf)

5) 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 122, 26-34 (http://dx.doi.org/10.1016/j.agee.2007.01.005)

6) Immerzeel W, Huting JRM, Mantel S, Van Lynden G, Maingi P, Muchena F and Kamoni PT 2007. Green and blue water resources and assessment of soil and water management scenarios using an integrated modelling framework, IIED, SEI, IFAD, SADC, LEI and ISRIC, Wageningen (http://www.isric.org/isric/webdocs/docs/GWC_Report_3.pdf)

Creation and Review Dates
DIF Creation Date: 2010-09-13
Last DIF Revision Date: 2013-10-09

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