| | Food-crop yields in future greenhouse-gas conditions lower than expected |
 | | CHAMPAIGN, Ill. -- Open-air field trials involving five major food crops grown under carbon-dioxide levels projected for the future are harvesting dramatically less bounty than those raised in earlier greenhouse and other enclosed test conditions — and scientists warn that global food supplies could be at risk without changes in production strategies. |
 | | Older studies, as reviewed by the Intergovernmental Panel on Climate Change, suggest that increased soil temperature and decreased soil moisture, which would reduce crop yields, likely will be offset in C3 crops by the fertilization effect of rising CO2, primarily because CO2 increases photosynthesis and decreases crop water use. |
 | | Long and four colleagues were co-authors: Elizabeth A. Ainsworth, professor of plant biology; Andrew D.B. Leakey, research fellow in the Institute of Genomic Biology at Illinois; Donald R. Ort, professor of plant biology and crops sciences; and Josef Nösberger, professor at the Swiss Federal Institute of Science and Technology in Zurich. |
| www.eurekalert.org /pub_releases/2006-06/uoia-fyi062606.php (662 words) |