236 



Index. 



Thrashing machines,, cleaning before use, 76; 

 distribution by, 49. 



Tillage, distribution by, 48. 



Time to spray, 157. 



Tumbling mustard, description of, 171; eradica- 

 tion of, 151. 



Vanilla grass, 179. 



Vehicles, distribution by^, 47. 



Viper's bugloss, 222. 



Water, distribution by, 51. 



Weed.*;, distribution of. 40; eradication of, 08; 

 injuries from, 13; multiplication of, 11; num- 

 ber of species of,, 9. 



Wheat grass, 179. 



Wheat thief, description of, 218; eradication of, 

 221. 



White cockle, 216. 



Wild animals, distribution by, 51. 



Wild buckwheat, description of, 210; eradica- 

 tion of. 213. 



Wild carrot, description of, 228; eradication of, 

 230. 



Wild flax, description of, 165; eradication of, 

 151. 



Wild lettuce, description of, 137; eradication ot 

 140. 



Wild morning glory, description of, 206; eradi- 

 cation of. 209. 



Wild mustard, description of, 161; eradication of, 

 151. 



Wild oat, description of, 183; eradication of, 187. 



Wild radish, eradication of, 151. 



Winds, distribution by, 52. 



Winter annuals, 62. 



