By Vernon Ruttan
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38 KIRIT S. 2. Irrigated land use and potential. ) Of course, one would expect that along with expansion of area, yield improvements will also continue to take place. This would reduce the pace of expansion of area. What are the prospects for yield increases? Yield Increases Yields vary considerably across regions depending on agroclimatic resources, input use, and the genetic variety used. It shows that the yields for all cereals are quite high for Europe and North America. 9 While Europe uses 142 kilograms per hectare, the world average of fertilizer use is only 30 kilograms per hectare.
W. 1991. Key elements of modern biotechnology of relevance to agriculture. Papers of the Plenary and Invited Paper Sessions. Twenty-first International Agricultural Economists' Association Conference, August 22-29. Tokyo: International Agricultural Economists' Association. Roberts, P. C. 1977. SARUM 76-Global Modeling Project. Research Report no. 19. K. Department of Environment and Transport. Robinson, J. 1985. Global modeling and simulations. In Climate Impact Assessment, edited by R. W. Kates, J.
The flow of germ plasm has been AGRICULTURAL AND FOOD SYSTEM SCENARIOS 43 enormous. Indian material was in 1,249 varieties, including 579 varieties released in other countries. Similarly, of the 1,236 varieties released in China, 532 had germ plasm from India. Such flows would not have been easy without a network of research institutions, including international institutions. This highlights the extremely important role played by international cooperation and international research institutions.
Agriculture, Environment, and Health: Sustainable Development in the 21st Century by Vernon Ruttan