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- Haefele, S.M.; Wopereis, M.C.S.; Ndiaye, M.K.; Kropff, M.J.
- Agricultural systems 2003 v.76 no.v pp. 313-335
- biophysics; crop management; crop yield; cultivars; dry season; dynamic models; ecophysiology; farmers; fertilizer rates; food prices; industrial symbiosis; integrated agricultural systems; irrigated farming; irrigation; manual weed control; nitrogen fertilizers; phosphorus fertilizers; potassium fertilizers; profit maximization; rice; risk; socioeconomic factors; soil fertility; soil heterogeneity; soil nutrients; soil treatment; sowing date; weather; wet season; Mali
- ... A framework to optimize soil fertility management in irrigated rice, based on soil and climate variability, fertilizer and paddy prices and farmers' objectives is presented. The framework uses three models in succession. The dynamic ecophysiological ORYZAS model simulates potential rice yields under irrigation, based on weather conditions, cultivar choice and sowing date. This yield potential is u ...
- Nijbroek, Ravic; Hoogenboom, Gerrit; Jones, James W.
- Agricultural systems 2003 v.76 no.v pp. 359-377
- Glycine max; center pivot irrigation; coastal plains; crop models; crop yield; drainage water; economic analysis; farmers; irrigation requirement; irrigation scheduling; irrigation water; meteorological data; particle size distribution; plant available water; prices; soybeans; uncertainty; water stress; Southeastern United States
- ... During the last few years, water has become a limited resource in the southeastern USA. Most farmers, however, are not using any scheduling methods to optimize their irrigation applications. The objective of this study was to determine the feasibility of spatially variable irrigation management for a typical soybean field in the Coastal Plain area. The selected field (9.94 ha) had previously been ...