An Rpt. Office of Experiment Stations, 1906. 



Plate VII. 



Fig. 1.— Field to Left Sprayed, Strip on Right Unsprayed. 



[Showing mustard plants in blossom three weeks after spraying.] 



"' -'t^^/li-r'^ 



Fig. 2.— On Left, Oats and Weeds From Three Harvester Bundles From 

 Treated Plat; on Right, Same From Untreated Plat. 



EFFECT OF SPRAYING OAT FIELDS WITH IRON SULPHATE SOLUTION 

 FOR ERADICATION OF WILD MUSTARD. 



