Index. 235 



Profits, increase by freedom from weeds, 36. 



Purple cockle, 214. 



Quack grass, description of, 176; eradication of, 

 179. 



Radisli, wild, eradication o£. 151. 



Ragweed, description of, 141; eradication of, 146. 



Railways, distribution by, 50. 



Redroot, 218. 



Root-stocks, distribution by, 54. 



Rotation, effect on, IS; modifying, 71. 



Russian thistle, description of, 196; eradication 

 of, 200. 



Salt, use of, in spraying, 156. 



Screenings, distribution by, 77. 



Scutcli grass, 176. 



Seed, clean, use of, 74. 



Seed grain, distribution by,. 41. 



Seed production, prevention of, 91. 



Shading, injury to crops by, 15. 



Shepherd's purse, eradication of, f^l. 



Sheep, use of in weed eradication, 84; grazing off 

 annual crops with, 93. 



Soiling crops, use in weed eradication. 82. 



Sow thistle, description of, 124; eradicaton of, 

 126. 



Spraying, as means of eradication, 156; cost of, 

 160; machinery, 159; materials, loS. 



Spud, description of, 104; method of using, 105; 

 use of, 99. 



Spudding, cost of, 101. 



Sticky cockle, 216. 



Stinkweed, 168. 



Summer grass, 191. 



Thistle, Canada, description of, 115; eradication 

 of, 118; Russian, description of, 196; eradi- 

 cation of, 200; sow, description of, 124; 

 eradication of, 126. 



Thistle family, weeds of, 113. 



