86 Weeds. 



location, soil, climate, and other conditions, 

 and is therefore not without its limitations ; 

 but so important is it, notwithstanding all 

 these considerations, that the aim should 

 usually be to grow food supplies at home 

 to the greatest possible extent. The effort 

 thus made to increase production will prove 

 greatly advantageous in reducing weeds. 

 For example, when corn is grown for the 

 silo to be used as winter fodder, it gives 

 ample opportunity for checking those weeds 

 which may attempt to grow in the corn ; 

 whereas if they grew among crops that were 

 raise-d for the sake of the grain to be sold 

 from them, they migiit not be equally effec- 

 tually disturbed ; and it is generally evident 

 that where food supplies are grown at 

 home, the farmer has power to prevent the 

 weeds which grow in the crops producing 

 them from ripening their seeds, a power 

 which he cannot possess when the food 

 supplies are purchased elsew'here. It is 

 true that the purchase of food supplies on 

 a more or less extensive scale is sometimes 

 a necessity, as where dairying and the keep- 

 ing of live stock are largely engaged in, 

 but all grains so purchased, when the pres- 

 ence of weed seeds in them is suspected, 



