TILLAGE 



355 



stroyed. Experiments have been made with corn to show the effect 

 of cutting the roots similar to what is done in cultivation to a 

 depth of four inches. The following tahle gives the results obtained : 



Results of Shallow and Deep Cultivation utui Ituot Pruning of Corn 6 (Yields in 

 Buxhels Per Acre) 



* No mulch produced. 



t A frame one foot square was placed over tlie hill of corn and a knife wa." run around 

 the outside 4 inches deep. 



The effect of cutting the corn roots is shown by comparing plots 

 4 and 5, where a difference of 1;?.^ bushels per acre is shown in 

 favor of no root injury, and the difference is about the same when 

 plots fi and 7 arc compared. 



Level Cultivation. Under practicallv all conditions of rainfall 

 and soils almost level cultivation is most desirable. Kidired cultiva- 



Fio. 172. Lev. 



rultivation. 



