CONTENTS 



Page 



INTRODUCTION 1 



LITERATURE REVIEW 2 



EXPERIMENTAL STUDIES AND RESULTS 4 



Seed Source and Preparation 4 



Tests for Volatile Inhibitors 4 



Tests for Water Soluble Toxins 5 



Toxicity of Plant Leachates on Soils 10 



Field Soil Bioassay 13 



Seedbed Effect on Germination 15 



ALLELOPATHY AND MYCORRHIZAE 19 



SUMMARY 19 



CONCLUSIONS 20 



PUBLICATIONS CITED 21 



