CONTENTS. 



PAGE 



CHAPTER I. 

 INTRODUCTION i 



CHAPTER II. 

 DISTRIBUTION OF WEEDS - - - 10 



CHAPTER III. 

 PREVENTION AND ERADICATION OF WEEDS - 43 



CHAPTER IV. 

 VITALITY OF WEED SEEDS 72 



CHAPTER V. 

 HABITS OF WEEDS ------- 84 



CHAPTER VI. 

 PARASITIC WEEDS " -92 



CHAPTER VII. 

 POISONOUS AND INJURIOUS WEEDS 103 



CHAPTER VIII. 

 ARABLE WEEDS. ASSOCIATION WITH SOILS. I. GENERAL - - - 117 



CHAPTER IX. 



ARABLE WEEDS. ASSOCIATION WITH SOILS. II. SPECIAL - - - 121 



vii 



