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- W2290301892 abstract "Agriculturalists in the 21st century will be farming crops in different climates than today. Atmospheric CO{sub 2} will likely exceed 700 {micro}l l{sup {minus}1} by the latter half of the next century, and the mean global temperature has been predicted to be 1.5 to 5.9 C higher than today. Further, the incidence of extreme weather events within a growing season has been predicated to increase. Extreme-weather events often limit crop yields even in today`s environment; e.g., a late spring may severely limit a citrus or winter wheat crop. Agricultural productivity is extremely sensitive to changes projected in the environment, particularly where crops are produced in marginal areas. The authors conducted several studies in which plants were grown in controlled environments with natural radiation levels. Carbon dioxide, water, temperature, and nutrients were each varied independently while the other factors were maintained at nearly optimum conditions. Photosynthesis, transpiration, growth and rate of development were measured. At nearly optimum temperature (26 to 28 C), doubling today`s atmospheric CO{sub 2} concentration results in about 50% increase in biomass production with only trivial changes in the ratio of vegetative to fruit or grain production. However, fruit or grain production is drastically reduced at above-optimum temperatures.more » The authors examined long-term climatology data from four areas in the US Cotton Belt and a maritime climate, Maros, Indonesia.« less" @default.
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- W2290301892 date "1996-12-31" @default.
- W2290301892 modified "2023-09-28" @default.
- W2290301892 title "Food and agriculture in the 21st century" @default.
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