Biophysics

Challenge of Plant and Agriculutral Sciences to the Crisis by Kazuo Watanabe, Atsushi Komamine

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By Kazuo Watanabe, Atsushi Komamine

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In the intensive research interviews which I undertook in 1993 and 1994 with about thirty farmers scattered over semi-arid northeastern Thailand, every farmer without exception said that they have experienced a decrease in the yield of rice and cassava within the last twenty years, and blamed a decrease in soil fertility as the cause. Many farmers told me that they did not have enough barnyard manure to apply to their fields, as agricultural machines had replaced draft animals. They told me that they reluctantly had to start applying small amounts of expensive chemical fertilizer to non-irrigated paddy and upland crop fields in order to cope with the soil degradation.

Population and Food in the Early Twenty-First Century: Meeting Future Food Demand of an Increasing Population. Washington, D. : International Food Policy Research Institute, 1995:167-189. 17. Postel P. Last Oasis: Facing Water Scarcity. The World Watch Environmental Alert Series, New York: W. W. Norton, 1992. 18. This survey was supported by Research Center for Rural Economy in Beijing, Agricultural Committee of Communist Party of Shanxi and a capable research assistant, Ms. Guo Jin Ping. 19. Brown LR.

Bumb B. Growth potential of existing technology is insufficiently tapped. In: Islam N, ed. Population and Food in the Early Twenty-First Century: Meeting Future Food Demand of an Increasing Population. Washington, D. : International Food Policy Research Institute, 1995:191-205. 24. Brown LR. Full House, New York: Norton, 1994. 25. Author’s personal communication with Professor Takeshi Horie (a leading Japanese crop scientist), Kyoto University. 26. IRRI. IRRI Rice Almanac, 1993-95. Manila: International Rice Research Institute, 1993:8.

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