Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 421603
Title Projected changes in soil organic carbon stocks upon adoption of recommended soil and water conservation practices in the upper Tana river catchment, Kenya
Author(s) Batjes, N.H.
Source Land Degradation and Development 25 (2014)3. - ISSN 1085-3278 - p. 278 - 287.
DOI http://dx.doi.org/10.1002/ldr.2141
Department(s) International Soil Reference and Information Centre
ICSU World Data Centre for Soils
ISRIC - World Soil Information
Publication type Refereed Article in a scientific journal
Publication year 2014
Keyword(s) climate-change - land-use - agricultural soils - data requirements - sequestration - management - uncertainty - impacts - world - dynamics
Abstract Large areas in the Upper Tana river catchment, Kenya, have been over-exploited, resulting in soil erosion, nutrient depletion and loss of soil organic matter (SOM). This study focuses on sections of the catchment earmarked as being most promising for implementing Green Water Credits, an incentive mechanism to help farmers invest in land and soil management activities that affect all fresh water resources at source. Such management practices can also help restore SOM levels towards their natural level. Opportunities to increase soil organic carbon (SOC) stocks, for two broadly defined land use types (croplands and plantation crops, with moderate input levels), are calculated using a simple empirical model, using three scenarios for the proportion of suitable land that may be treated with these practices (low¿=¿40¿per¿cent, medium¿=¿60¿per¿cent, high¿=¿80¿per¿cent). For the medium scenario, corresponding to implementation on ~348¿000¿ha in the basin, the eco-technologically possible SOC gains are estimated at 4·8 to 9·3¿×¿106¿tonnes (Mg) CO2 over the next 20¿years. Assuming a conservative price of US$10 per tonne CO2-equivalent on the carbon offset market, this would correspond to ~US$48–93 million over a 20-year period of sustained green water management. This would imply a projected (potential) payment of some US$7–13¿ha-1 to farmers annually; this sum would be in addition to incentives that are being put in place for implementing green water management practices and also in addition to the benefits that farmers would realize from the impact on production of these practices themselves
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