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 477938
Title From soil nutrient balances to regional policy analysis : a case study of integrated assessment in Machakos, Kenya
Author(s) Mora Vallejo, A.P.
Source Wageningen University. Promotor(en): Tom Veldkamp, co-promotor(en): J. Antle; Jetse Stoorvogel. - Wageningen : Wageningen University - ISBN 9789462571389 - 168
Department(s) Soil Geography and Landscape
Publication type Dissertation, internally prepared
Publication year 2014
Keyword(s) bodem - voedingsstoffenbalans - regionaal beleid - beoordeling - bodemkarteringen - landgebruik - modelleren - kenya - soil - nutrient balance - regional policy - assessment - soil surveys - land use - modeling
Categories Land Use Planning


The efficiency of agricultural production is key when addressing poverty and hunger in subsistence farming systems of developing countries. The transition of the subsistence systems into more productive and more sustainable land use needs to be directed by strong public interventions and investments. While policy documents for agricultural improvement often end up with a general “to do” list of recommendations, the actual effects of these technology or policy interventions are seldom evaluated for specific regions or cases. This study combines biophysical and economic research into an integrated assessment which can help to evaluate these recommendations for specific conditions. The nutrient balance model NUTMON and the Tradeoff Analysis Model are linked and subsistence farming systems in the Machakos region in Kenya are studied. The integrated modelling approach is used to evaluate a range of different policy interventions proposed in recent policy documents by the Kenyan government. This type of analysis normally requires intensive environmental and economic data collection. Therefore, new technologies for data gathering such as Digital Soil Mapping and the effect of input data resolution on model results are tested. The study clearly shows that more detailed input data are not always necessary to provide more accurate results. Policy makers can benefit from this type of methodology anticipating the possible effects of certain innovations in actual productions systems.

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