TABLE OF CONTENTS 



Chapter Page 



I. Weeds: Injury to Crops and Nature of.. I 



II. Kinds of Weeds as to Duration 7 



III. Dispersal of Weed Seeds 14 



IV. The Farmer's Interest in Good Seed, and 



How to Test Seed 27 



V. Weed Impurities in Agricultural Seeds 32 



VI. Some Weed Laws and Seed-Control Laws.. 43 



VII. Weeds of Special Crops 50 



VIII. Poisonous Weeds 63 



IX. Table of Noxious Weeds 65 



X. Migration of Weeds 76 



XL Extermination of Weeds 87 



XII. Treatment for Special Weeds 104 



XIII. Morphology of Weeds 114 



XIV. Descriptions of Some Common Weeds 135 



XV. Partial Bibliography, Consisting of Easily 



Accessible References, Arranged by Har- 



riette S. Kellogg 255 



vli 



