306 



THE BOOK OF CORN 



« 



SI 



and 668^4 days of team service to accomplish the har- 

 rowing, or an average of 6.6 acres per day's labor. 



Listing — This method of planting is little prac- 

 ticed except in Kansas and 

 Nebraska. Under the proper 

 soil and climate conditions it is a 

 desirable method, and so far as 

 the amount of labor required is 

 concerned it is far cheaper than 

 the usual practice. In this in- 

 vestigation 560 acres were listed, 

 requiring 92^2 days of labor and 

 1 1934 days of team service, the 

 accomplishment per day's labor 

 being 6.1 acres. 



Fertilization — The percentage 

 of the total corn acreage which 

 in any year is fertilized by the 

 direct application of fertilizing 

 material is so small as to hardly 

 merit consideration. Where this 

 is done at all it is usually thus 

 treated once in a series of years, 

 so that the full cost of such treat- 

 ment cannot properlv be charged 

 to the single crop following. The 

 usual method of maintaining fer- 

 tility is by devoting the land 

 occasionally to some renovating 

 crop, like clover, and when this 

 is done it is obvious that some 

 allowance must be made for the 

 less valuable product of the land 

 in that year, but what that allowance should be cannot 

 be determined with accuracy. 



In this investigation no allowance has been made 





Fig 90— Ear of Com Rid. 

 died by the Grai.i Moth 



(After Riley) 



