By D. K. L. Mackerron, A. J. Haverkort
Versions of crop progress and improvement have been initially conceived for clinical reasons. quite often, they describe the mechanisms of crop creation, improvement from emergence via tuber initiation to senescence decided by way of temperature and day-length. development is pushed via sunlight radiation intercepted by means of the foliage. Yields are improved by way of the supply of water and nutrition and will be diminished through pests, ailments and weeds. those clinical types are leaving the study institutes and more and more have gotten a way of data move for college students, and most significantly, to growers and their intermediaries equivalent to extensionists and experts. Many choice help platforms (DSS) have a mechanistic version center that assures their robustness and reliability. This ebook supplies an outline of model-based DSS in potato construction. selection aid structures are utilized by the processing to steer them to promising construction parts and via breeders to spot the precise genotype for such environments. specialists and soil laboratories use them in addition to farmers to optimize using nitrogen, water and chemical substances to regulate bugs, nematodes, overdue blight and weeds
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Extra resources for Decision support systems in potato production: Bringing models to practice
Scientific basis Potato crop development such as sprout growth rate, emergence, leaf area development depend on temperature. Dry matter accumulation depends on the amount of solar radiation intercepted by the crop and dry matter distribution between the various organs is determined by temperature and daylength. J. Haverkort, A. Verhagen, C. J. Uithol 1899 1949 1990 Figure 2. Distribution of potato production in 1899, 1949 and 1990 (Hawkins, 1957; Rowe, 1993) needed for optimal growth, growth is reduced.
Haverkort, A. Verhagen, C. J. Uithol Potential Production first season Water limited production first season t dm ha-1 <5 5 - 10 10 - 15 15 - 20 20 - 25 >25 Figure 6. Calculated potential (left) and water limited yields (right) for Africa. the Rift Valley stretching from the Bekaa Valley in Lebanon through Lake Malawi. There, most potatoes are grown under rainfed conditions in the highlands of Sudan, Ethiopia, Kenya, Uganda, Congo, Rwanda and Burundi. Rainfed yields there are the highest in the world and may exceed 20 t ha-1 tuber dry matter yield (over 80 t ha-1 fresh yield).
G. dry matter concentration, tuber size? • Can seed potatoes be grown locally or do they have to be imported? • How remote are the growing and processing areas from the consumers? (The market and production should be close as to avoid expensive transport. 5 60° Figure 1. Global potato distribution (Hijmans, 2001). Figure 2 illustrates what happened in the United States of America. Over one hundred years ago potatoes were grown where people lived. Now potatoes are produced where they can best be grown given the climate and soil conditions.