84 Weeds. 



destroying a specially troublesome weed like 

 the Canada thistle, whose habit leads it to 

 grow throughout the whole season, as well 

 as such weeds as mature their seeds very 

 early in the season, or such as mature their 

 seeds very late; or, if it be desirable to take 

 advantage of it, the growing of an early 

 soiling crop gives opportunity for subject- 

 ing lands to the fallow process. 



10. Call ill the aid of sheep. Those who 

 have had experience in keeping sheep do 

 not need to be told that where sheep are 

 kept in sufficient numbers some forms of 

 weed life soon entirely disappear, that other 

 forms are much crippled in their powers of 

 growth and so gradually disappear, while 

 still other forms are w^eakened though they 

 may not be entirely destroyed. On pasture 

 lands with stiff clay subsoils, sheep will 

 eventually prove more than a match for the 

 Canada thistle, if the pasture is at all times 

 kept closely eaten, but several seasons of 

 such cropping may be required to effect this 

 end. Nearly all biennial weeds and some 

 perennials as, for example, the ox-eye daisy, 

 will be greatly checked when thus pastured ; 

 and the same is true of some annuals, as 

 ragweed and wheat thief. If sheep are 



