Possibility of Destroying Weeds. 39 



more labor is required to remove weeds 

 from the line of the rows, and the hand 

 labor thus employed is always relatively 

 more expensive than horse labor. Because 

 of this, the untenable conclusion has been 

 reached by some that in America it will 

 not pay to grow croi)S which require hand 

 labor to keep them clean. The labor of 

 cleaning by other modes, such as the bare 

 fallow, is also increased as weeds multiply, 

 and this increase of labor not only results 

 from the greater frequency with which the 

 bare fallow would have to be resorted to by 

 those who practice it, but also from the 

 thoroughness with which the bare fallow 

 would have to be managed to make it effec- 

 ti've when weeds are plentiful, to say noth- 

 ing of the loss that is occasioned by the 

 greater frequency of the seasons when 

 crops can not be growm because of the land 

 lying idle in bare fallow. 



