152 



CORN CROPS 



sive and must be disposed of in some way, as by drainage, 

 run-off, or evaporation. 



Even though the crop requires a relatively small pro- 

 portion of the total rainfall, the crop often suffers due to 

 the fact 'that this small proportion is required during a com- 

 paratively short period and in excess of the water-storing 

 capacity of the soil. 



Lyon and Fippin' give the following statement regarding 

 the water-holding capacity of some soils : — 

 TABLE XXXIV 



Studies at the Nebraska station indicate the water 

 requirements of a 50-bushel corn crop for the different 

 months to be about as follows : — 



TABLE XXXV 



Inches 



January 1 to June 1 

 June . . . . 



July 



August ... 

 September .... 

 October 1 to January 1 

 Total .... 



.00 



.50 



3.60 



3.30 



.60 



00 



8.00 



' LtOn and Fippin. Soils, p. 158. 



2 Assumed. 



