'J2 Weeds. 



ragweed seeds have become greatly reduced 

 in number through the growing of crops 

 which require late cultivation. Other weeds, 

 such as the Canada thistle, grow in all kinds 

 of crops, so that when a piece of ground is 

 badly infested with them some kind of cul- 

 tivated crop should be grown upon it, as 

 the constant cultivation required will tend 

 to destroy them while the crop is growing. 



Farmers are usually much averse to a 

 modification of their fixed scheme of rota- 

 tion, even for a limited time; and more 

 especially so when the modification inter- 

 feres with those crops which have been their 

 chief source of cash revenue. Notwith- 

 standing this, the truth remains that where 

 the modification required for the destruc- 

 tion of any sort of weed is not made, the 

 ultimate eradication of this weed will be 

 found a very difficult matter. 



J. Adapt methods to conditions. In our 

 attempts to eradicate weeds, we should care- 

 fully adapt the methods that we follow to 

 those conditions of soil, climate, cultiva- 

 tion, etc., which we find to exist. These 

 conditions have, of course, an important 

 bearing on the growth of weeds, and, 

 therefore, upon their destruction. In stiff 



