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Farmer Demand for Soil Fertility Management Practices in Kenya’s Grain Basket

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  • Kamau, Mercy
  • Smale, Melinda
  • Mutua, Mercy
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    Abstract

    Use of soil amendments, including organic materials and mineral fertilizers, is highly recommended for the replenishment of soil nutrients, improved soil health and more efficient use of fertilizers in sub-Saharan Africa. Along with other constraints, underdeveloped markets are often cited as a reason for limited uptake of recommended practices. Recognizing the potential interrelationship among practices, we estimate seemingly-unrelated, multivariate probit models to identify the factors that determine use of inorganic fertilizer, other soil amendments, and practices to control erosion by smallholder farmers in Kenya. We then estimate demand for the most common soil nutrients (N and P). We find that, consistent with theory, farmers are price-responsive and remoteness depresses demand for mineral fertilizers. Knowledge and plot tenure have a strong influence on use of soil fertility management practices. Sex of household head affects use of soil fertility management practices only in maize production, and particularly in use of N and P. Decisions to use different categories of soil fertility management practices are correlated.

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    Bibliographic Info

    Paper provided by Agricultural and Applied Economics Association in its series 2013 Annual Meeting, August 4-6, 2013, Washington, D.C. with number 150722.

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    Date of creation: 2013
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    Handle: RePEc:ags:aaea13:150722

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    Keywords: soil management; fertility; multivariate probit; demand; plot-level; Kenya; Consumer/Household Economics; Crop Production/Industries; Demand and Price Analysis; Environmental Economics and Policy; Farm Management; International Development;

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    1. Place, Frank & Barrett, Christopher B. & Freeman, H. Ade & Ramisch, Joshua J. & Vanlauwe, Bernard, 2003. "Prospects for integrated soil fertility management using organic and inorganic inputs: evidence from smallholder African agricultural systems," Food Policy, Elsevier, vol. 28(4), pages 365-378, August.
    2. Abdulai, Awudu & Owusu, Victor & Goetz, Renan, 2011. "Land tenure differences and investment in land improvement measures: Theoretical and empirical analyses," Journal of Development Economics, Elsevier, vol. 96(1), pages 66-78, September.
    3. Jeffrey H. Dorfman, 1996. "Modeling Multiple Adoption Decisions in a Joint Framework," American Journal of Agricultural Economics, Agricultural and Applied Economics Association, vol. 78(3), pages 547-557.
    4. Mapila, Mariam A.T.J. & Njuki, Jemimah M. & Delve, Robert J. & Zingore, Shamie & Matibini, Josephine, 2012. "Determinants of Fertiliser Use by Smallholder Maize Farmers in the Chinyanja Triangle in Malawi, Mozambique and Zambia," 2012 Conference, August 18-24, 2012, Foz do Iguacu, Brazil 123354, International Association of Agricultural Economists.
    5. Omamo, S. W. & Williams, J. C. & Obare, G. A. & Ndiwa, N. N., 2002. "Soil fertility management on small farms in Africa: evidence from Nakuru District, Kenya," Food Policy, Elsevier, vol. 27(2), pages 159-170, April.
    6. Lorenzo Cappellari & Stephen P. Jenkins, 2003. "Multivariate probit regression using simulated maximum likelihood," United Kingdom Stata Users' Group Meetings 2003 10, Stata Users Group.
    7. Johannes Sauer & Hardwick Tchale, 2009. "The Economics of Soil Fertility Management in Malawi," Review of Agricultural Economics, Agricultural and Applied Economics Association, vol. 31(3), pages 535-560, 09.
    8. Paswel P. Marenya & Christopher B. Barrett, 2009. "Soil quality and fertilizer use rates among smallholder farmers in western Kenya," Agricultural Economics, International Association of Agricultural Economists, vol. 40(5), pages 561-572, 09.
    9. Marenya, Paswel P. & Barrett, Christopher B., 2007. "Household-level determinants of adoption of improved natural resources management practices among smallholder farmers in western Kenya," Food Policy, Elsevier, vol. 32(4), pages 515-536, August.
    10. de Janvry, Alain & Fafchamps, Marcel & Sadoulet, Elisabeth, 1991. "Peasant Household Behaviour with Missing Markets: Some Paradoxes Explained," Economic Journal, Royal Economic Society, vol. 101(409), pages 1400-417, November.
    11. Minot, Nicholas & Kherallah, Mylène & Berry, Philippe, 2000. "Fertilizer market reform and the determinants of fertilizer use in Benin and Malawi," MTID discussion papers 40, International Food Policy Research Institute (IFPRI).
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