A comprehensive course in tropical agriculture for the staff of co-operatives and other organisations. INTRODUCTION PART 1. SOIL AND THE NATURAL ENVIRONMENT Progress Test on Part 1 Answers to Progress Test on Part 1 PART 2. FERTILISERS AND PLANT NOURISHMENT Progress Test on Part 2 Answers to Progress Test on Part 2 PART 3. CONTROLLING PESTS AND DISEASES Progress Test on Part...