Determinants of Adoption and Spatial Diversity of Wheat Varieties on Household Farms in Turkey
The Heckman two-stage estimation procedure was used to investigate factors influencing the adoption of modern and/or landrace wheat varieties and spatial diversity of wheat varieties in Turkey. In the first stage, the multinomial logit choice model (MNLM) was used to determine factors influencing farmers’ adoption of modern varieties (MVs) and/or landrace varieties (LVs) of wheat. Conditional on the choice of a given wheat variety or combination of MVs and LVs, a Tobit regression model was used to assess the determinants of on-farm spatial diversity of wheat varieties in the second stage. Our empirical approach allows for the analysis of partial adoption decision of wheat varieties and controls for self-selection problem in analyzing the determinants of spatial diversity of wheat varieties. The empirical model was conceptualized based on random utility model(RUM).The analysis was based on cross-sectional survey data collected on 486 sample households in six provinces of Turkey. Results showed that household size, the number of owned cattle, the number of buildings on farm, farm size, farm land fragmentation, the percentage of irrigable farm plots and regional variations are the important factors in determining the farmers’ first-stage choice of wheat variety types. The selfselection problem was significant only in one of the three cases for the landrace wheat varieties. In the second stage, the farm size and land fragmentation were found to be the key variables influencing the level of on-farm spatial diversity of wheat varieties. The results showed that considerable spatial wheat genetic diversity was maintained on-farm at the household level, mainly through the simultaneous adoption of modern and traditional wheat varieties. Growing a combination of modern and landrace wheat varieties was observed to yield significantly higher level of spatial diversity of wheat genetic resources as compared to growing modern varieties alone or landrace varieties alone. This result suggests that the modern and landrace wheat varieties can coexist and could still support more on-farm spatial diversity of wheat genetic resources. This finding has significant implications for future extension, research and policy efforts for on-farm conservation and utilization of wheat genetic resources in Turkey. There is a need for the government and private sector research and extension efforts to support farmers’ use of both modern and landrace varieties, for example, in terms of seed supply, provision of extension and credit services and marketing support instead of just giving undue priority to popularization and adoption of modern varieties alone.
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- E. Meng, M. Smale & Brennan, John P. & Hu, Ruifa, 2003. "Determinants of spatial diversity in modern wheat: examples from Australia and China," Agricultural Economics of Agricultural Economists, International Association of Agricultural Economists, vol. 28(1), January.
- Melinda Smale & Joginder Singh & Salvatore Di Falco & Patricia Zambrano, 2008.
"Wheat breeding, productivity and slow variety change: evidence from the Punjab of India after the Green Revolution ,"
Australian Journal of Agricultural and Resource Economics,
Australian Agricultural and Resource Economics Society, vol. 52(4), pages 419-432, December.
- Smale, Melinda & Singh, Joginder & Di Falco, Salvatore & Zambrano, Patricia, . "Wheat breeding, productivity and slow variety change: evidence from the Punjab of India after the Green Revolution," Australian Journal of Agricultural and Resource Economics, Australian Agricultural and Resource Economics Society.
- Bellon, Mauricio R., 2004. "Conceptualizing Interventions to Support On-Farm Genetic Resource Conservation," World Development, Elsevier, vol. 32(1), pages 159-172, January.
- Anonymous, 2006. "Selected Posters, Annual Meetings," Journal of Agricultural and Applied Economics, Southern Agricultural Economics Association, vol. 38(02), August.
- Romina Cavatassi & Leslie Lipper & Ulf Narloch, 2011. "Modern variety adoption and risk management in drought prone areas: insights from the sorghum farmers of eastern Ethiopia," Agricultural Economics, International Association of Agricultural Economists, vol. 42(3), pages 279-292, 05.
- Bellon, Mauricio R & Taylor, J Edward, 1993. ""Folk" Soil Taxonomy and the Partial Adoption of New Seed Varieties," Economic Development and Cultural Change, University of Chicago Press, vol. 41(4), pages 763-86, July.
- Kruzich, Tyler J. & Meng, Erika C.H., 2006. "Wheat Landrace Cultivation in Turkey: Household Land-use Determinants and Implications for On-Farm Conservation of Crop Genetic Resources," 2006 Annual Meeting, August 12-18, 2006, Queensland, Australia 25617, International Association of Agricultural Economists.
- Benin, S. & Smale, M. & Pender, J. & Gebremedhin, B. & Ehui, S., 2004. "The economic determinants of cereal crop diversity on farms in the Ethiopian highlands," Agricultural Economics, Blackwell, vol. 31(2-3), pages 197-208, December.
- Smale, Melinda, 1996. "Understanding Global Trends in the Use of Wheat Diversity and International Flows of Wheat Genetic Resources," Economics Working Papers 7670, CIMMYT: International Maize and Wheat Improvement Center.
- Salvatore Di Falco & Jean-Paul Chavas & Melinda Smale, 2007. "Farmer management of production risk on degraded lands: the role of wheat variety diversity in the Tigray region, Ethiopia," Agricultural Economics, International Association of Agricultural Economists, vol. 36(2), pages 147-156, 03.
- Robert Tripp, 1996. "Biodiversity and modern crop varieties: Sharpening the debate," Agriculture and Human Values, Springer, vol. 13(4), pages 48-63, September.
- Bellon, Mauricio R. & Adato, Michelle & Becerril, Javier & Mindek, Dubravka, 2006. "Poor farmers' perceived benefits from different types of maize germplasm: The case of creolization in lowland tropical Mexico," World Development, Elsevier, vol. 34(1), pages 113-129, January.
- Gauchan, Devendra & Van Dusen, M. E. & Smale, Melinda, 2005.
"On farm conservation of rice biodiversity in Nepal: a simultaneous estimation approach,"
EPTD discussion papers
144, International Food Policy Research Institute (IFPRI).
- Eric Van Dusen & D. Gauchan & M. Smale, 2007. "On-Farm Conservation of Rice Biodiversity in Nepal: A Simultaneous Estimation Approach," Journal of Agricultural Economics, Wiley Blackwell, vol. 58(2), pages 242-259, 06.
- Latha Nagarajan & Melinda Smale & Paul Glewwe, 2007. "Determinants of millet diversity at the household-farm and village-community levels in the drylands of India: the role of local seed systems," Agricultural Economics, International Association of Agricultural Economists, vol. 36(2), pages 157-167, 03.
- Lee, Lung-Fei, 1983. "Generalized Econometric Models with Selectivity," Econometrica, Econometric Society, vol. 51(2), pages 507-12, March.
- Smale, M. & Meng, E. & Brennan, J. P. & Hu, Ruifa, 2003. "Determinants of spatial diversity in modern wheat: examples from Australia and China," Agricultural Economics, Blackwell, vol. 28(1), pages 13-26, January.
- Anonymous & Braun, Hans-Joachim & Kosina, Petr & Crouch, Jonathan, 2009. "Wheat Facts and Futures 2009," Facts and Trends/Overview and Outlook 56366, CIMMYT: International Maize and Wheat Improvement Center.
- Van Hung, Pham & MacAulay, T. Gordon & Marsh, Sally P., 2007. "The economics of land fragmentation in the north of Vietnam," Australian Journal of Agricultural and Resource Economics, Australian Agricultural and Resource Economics Society, vol. 51(2), June.
- Heal, Geoffrey & Walker, Brian & Levin, Simon & Arrow, Kenneth & Dasgupta, Partha & Daily, Gretchen & Ehrlich, Paul & Maler, Karl-Goran & Kautsky, Nils & Lubchenco, Jane, 2004. "Genetic diversity and interdependent crop choices in agriculture," Resource and Energy Economics, Elsevier, vol. 26(2), pages 175-184, June.
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