128 PRACTICAL CORN CULTURE 



machinery, the spring tension should be as loose as possible 

 consistent with effective work. If considerable corn is cracked 

 in shelling, the indications are that the corn was either too 

 dry, or the sheller is not properly adjusted. 



In order to secure a uniformity, a corn grader should be 

 used. There are hundreds of corn graders on the market. 

 They range in price from five dollars for small ones to eight 

 hundred dollars for large graders used in large seed corn 

 drying plants. The very cheapest corn graders will do better 

 work than will the average farm fan mill. A good grader 

 should take out all the large and small grains and about 

 nine-tenths of the cracked kernels. 



It is necessary to take out from twenty per cent to forty 

 per cent in order to have an even grade. The difference in 

 yield between graded and ungraded seed is often as much 

 as ten bushels per acre. This difference is due to the more 

 even planting of graded seed, not because the smaller and 

 larger kernels are poorer yielders. 



ADDITIONAL READING 



"The Study of Corn." By Vernon M. Shoesmith. 



"Corn." By Bowman and Crossby. 



"Seed Corn Must Make Good." By L. C. Hutcheson. Corn. 



March, 1913. 

 "Make Corn Growing Pay." The Fruit Grower and Farmer, 



1913. 

 "Getting Ready for This Year's Corn Crop." Twentieth 



Century Farmer. February 22, 1913. 

 "Ten Bushels More Corn to the Acre." By Robt. H. Moul- 



ton. Fruit Grower and Farmer. March, 1913. 

 "It Pays to Test the Seed Corn." By Arthur Lumbrick. 



The Prairie Farmer. March 15, 1913. 



