02725     2200241   4500001002100000005001500021035002000036007000300056008004100059020001800100100001600118245006100134260004100195300002900236650002100265650002200286650001600308650001300324520208600337082001902423084002502442990001602467INLIS00000000000119920240730074736  a0010-0224000169ta240730                g          0 eng    a0 85199 439 31 ahodges .F.H1 aclimate change and global crop productivity /cK.R reddy  alondon, UK :bCABI publishing,c2000  a472 Hlm :bilus ;c25 cm 4aclimatic changes 4acrops and climate 4acrop yields 4aRak Umum  aHuman activities are creating changes in our earth ecosystem. Emissions of carbon dioxide and other greenhouse gases are increasing. The evidence, using state-of-the-art computer models incorporating as much of the theor etical understanding of the earth's weather as possible, suggests that global warming is occurring along with shifting patterns of rainfall and incidences of extreme weather events. The rate of global climate change and warming expected over the next century is more than has occurred during the past 10,000 years. Changes in global environment will have profound effects and consequences for natural and agricultural ecosystems and for society as a whole. These changes could alter the location of the major crop production regions on the earth. Agricultural productivity is particularly vulnerable to disruption by weather. In the coming years, we have to produce more food, fibre and other commodities to cope with increasing population under diminishing per capita arable land and water and degrading soil resources and expanding biotic stresses. In addition to the above stringent constraints, shifting from 'normal weather, with its associated extreme events, zones of crop adaptation and cultural practices required for successful crop production will also surely change. Also, plant responses to climatic changes are not uniform and thus there will be winners and losers. Climate and weather- induced instability in food and fibre supplies will alter social and economic

stability and regional competitiveness. This book describes normal historical shifts in the earth's temperature and weighs the evidence concerning anthropogenically induced changes in temperature. It discusses the methods of predicting climatic changes and the role of today's agriculture in the production and release of greenhouse gases. The major aim of the text is to quantify the impact of altered climatic factors on different crops. The major food and fibre crops are evaluated, and crop responses to water and nutrient deficiencies in high CO? environments are predicted  a631.484:546.26  a631.484:546.26 HOD c  a00000002370