Unit 1

    Part A  Plants

    Part B  WHEAT-Tritieum Spp. (Gramineae-Tritieinae)

Unit 2

    Part A  Botany

    Part B  The Growth of Plants

Unit 3

    Part A  Carbon Dioxide Is Nature's Hidden Yield Enhancer

    Part B  Drainage and Irrigation

Unit 4

    Part A  Biological Power

    Part B  Ecofarming

Unit 5

    Part A  Crop Yields Decline with Topsoil Loss

    Part B  Potato

Unit 6

    Part A  Green Revolution

    Part B  Shrinking Wheat Cultivation Area

Unit 7

    Part A  Green Gene Technology

    Part B  The Agro-Eeological Zones(AEZ) Methodology

Unit 8

    Part A  The Bioteeh Century

    Part B  Comparison of Different Models for Agriculture

Unit 9

    Part A  Crop Yield Estimate Comparison Between Two Methods:Energy Balance and Water Balance

    Part B  Setting Realistic Crop Yield Goals

Unit 10

    Part A  Biodiversity and Organic Agriculture

    Part B  Triticum Aestivum L.

Unit 11

    Part A  Plant Breeding

    Part B  Jumping Genes Make Genetic Leaps

Unit 12

    Part A  Food Safety and Quality As Is Affected by Organic Farming

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

Unit 13

    Part A  New Wheats Will Help Growers Fight Weeds

    Part B  CIMMYT Wheats Take the Heat

Unit 14

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

    Part B  Rice

Unit 15

    Part A  Baby Corn Research Project 1998

    Part B  Corn

Unit 16

    Part A  Crop Breeding for Organic Agriculture

    Part B  U.S. Organic Agriculture Introduction

Unit 17

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

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

Unit 18

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

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

参考译文

Key to Exercises