AEID AGEICULTUEE. 



253 



BIND WEES 



CANADA 

 THISTI^E 



more possible than it would be for a Shorthorn 

 cow to change to a Jersey. Wild oats do seem to 

 come very mysteriously sometimes, but they ac- 

 cumulate in the soil unnoticed until they get 

 serious enough to be a pest. Growing alfalfa, 

 rotation of crops and clean culture are the only 

 successful remedies. 



This is a wild or vine Bvickwheat. It is one 

 of the worst western weeds in grain fields. Oare 

 should be taken to plant seed which does not con- 

 tain this weed. The seeds are small, three-cor- 

 nered and black or dark colored. Clean culture 

 is the remedy. Using a weeder in the .grain 

 field until the plants are a foot or more high will 

 kill most of the buckwheat. 



The Canada thistle is a perennial thistle 

 which is one of the most persistent and difficult 

 weeds to kill. It has been introduced into some 

 parts of the arid region, but usually occurs in 

 small patches only. Where there are only small 

 spots of thistle, the suggestion has been made 

 that the hay and straw be stacked over them. 

 The plants may be killed by digging out root and 

 branch. It is said that sprinkling with common 

 salt solution, one-third barrel of salt to fifty-two 

 gallons of water, will kill it. This will probably 

 kill anything else that it is applied to as well; 

 but it will pay to stop the spread of these thistles, 

 even at sacrifice of the crop. The plants should 

 never be allowed to go to seed. 



