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Unit 1 1

Part A Plants 1

Part B WHEAT-Triticum Spp.(Gramineae-Triticinae)) 11

Unit 2 17

Part A Botany 17

Part B The Growth of Plants 21

Unit 3 25

Part A Carbon Dioxide Is Nature's Hidden Yield Enhancer 25

Part Brainage and Irrigation 36

Unit 4 39

Part A Biological Power 39

Part BEcofarming 47

Part A Crop Yields Decline with Topsoil Loss 53

Unit 5 53

Part B Potato 61

Unit 6 65

Part A Green Revolution 65

Part B Shrinking Wheat Cultivation Area 78

Unit 7 82

Part A Green Gene Technology 82

Part B The Agro-Ecological Zones(AEZ)Methodology 88

Unit 8 100

Part A the Biotech Century 100

Part B Comparison of Different Models for Agriculture 107

Unit 9 109

Part A Crop Yield Estimate Comparison between Two Methods:energy Balance and water Balance 109

Part B setting Realistic Crop Yield Goals 118

Part A Biodiversity and Organic Agriculture 124

Unit 10 124

Part B triticum Aestivum L. 133

Unit 11 147

Part A plant Breeding 147

Part B jumping Genes Make Genetic Leaps 154

Unit 12 158

Part A Food Safety and quality As Is Affected by Organic Farming 158

Part B effect of Till and No-Till Soybean Cultivation on Dynamics of Entomopathogenic Fungi in the Soil 171

Unit 13 177

Part A New Wheats Will Help Growers Fight weeds 177

Part BCIMMYT Wheats Take the Heat 183

Unit 14 186

Part A Induction of Photoperiod Sensitive Genetic Male Steriles for Use in Hybrid Rice Seed Production 186

Part B Rice 194

Part A Baby Corn Research project 1998 200

Unit 15 200

Part B Corn 215

Unit 16 218

Part A crop Breeding for Organic Agriculture 218

Part B U.S.Organic Agriculture Introduction 234

Unit 17 239

Part A the Future of Agriculture:Challenges for Environment,Health and Safety Regulation of Pesticides 239

Part B feeding a World of 10 Billion People:the Miracle Ahead(I) 251

Unit 18 264

Part A A Pilot Project on Rapid Estimates of rop Area Changes from a Scattered Sample of Mini-Sites 264

Part B feeding a World of 10 Billion People:the Miracle Ahead(II) 274

参考译文 285

Key to Exercises 345