Intensive versus low-input cropping systems: What is the optimal partitioning of agricultural area in order to reduce pesticide use while maintaining productivity?
Pesticide use should be reduced for sustainable agriculture. Low-input cropping systems, centered on hardy varieties that maintain their yield in the presence of pests, allow pesticide use to be reduced. Since yield potential is generally lower for hardy varieties than for high-yielding varieties, a balance must be found between production and pesticide reduction. In order to compute the optimal partitioning of agricultural area between intensive and low-input cropping systems, we present a model that allows yield and gross margins to be computed at the landscape scale, as a function of the proportion of the area under intensive and low-input systems. The model shows that two cases must be distinguished, depending on inoculum production by each of the coexisting systems. If the low-input system produces less inoculum (e.g. because resistant varieties are used), coexistence can be optimal, whereas if the low-input system produces more inoculum (e.g. because tolerant varieties are used), it is best to devote the whole area to a single system. The model gives the gross margin for each cropping system as a function of the proportion of low-input systems - and so predicts the proportion to which the farmers' choices will lead - and illustrates the use of different (simplified) policies that would ensure that the optimum proportion is reached.
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- Pretty, J. N. & Brett, C. & Gee, D. & Hine, R. E. & Mason, C. F. & Morison, J. I. L. & Raven, H. & Rayment, M. D. & van der Bijl, G., 2000. "An assessment of the total external costs of UK agriculture," Agricultural Systems, Elsevier, vol. 65(2), pages 113-136, August.
- Havlik, Petr & Bamiére, Laure & Jacquet, Florence & Millet, Guy, 2008.
"Spatially explicit farming system modelling for an efficient agri-environmental policy design,"
2008 International Congress, August 26-29, 2008, Ghent, Belgium
44172, European Association of Agricultural Economists.
- Havlik, Petr & Bamiére, Laure & Jacquet, Florence & Millet, Guy, 2008. "Spatially explicit farming system modelling for an efficient agri-environmental policy design," 107th Seminar, January 30-February 1, 2008, Sevilla, Spain 6676, European Association of Agricultural Economists.
- Vanloqueren, Gaëtan & Baret, Philippe V., 2008. "Why are ecological, low-input, multi-resistant wheat cultivars slow to develop commercially? A Belgian agricultural 'lock-in' case study," Ecological Economics, Elsevier, vol. 66(2-3), pages 436-446, June.
- Janssen, Sander & van Ittersum, Martin K., 2007. "Assessing farm innovations and responses to policies: A review of bio-economic farm models," Agricultural Systems, Elsevier, vol. 94(3), pages 622-636, June.
- David J. Pannell, 2008. "Public Benefits, Private Benefits, and Policy Mechanism Choice for Land-Use Change for Environmental Benefits," Land Economics, University of Wisconsin Press, vol. 84(2), pages 225-240.
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