CORN 



53 



9. "Cracked" corn shall include all coarsely broken pieces of kernels that will pass 

 through a perforated metal sieve with round holes J of an inch in diameter, except 

 that the finely broken corn as provided under Rule No. 8 shall not be considered 

 as "cracked" corn. 



10. It is understood that the damaged corn, the foreign material, including pieces 



of cob, dirt, finely broken corn, other grains, etc., and the coarsely broken or 

 "cracked" corn, as provided for under the various grades shall be such as occur 

 naturally in corn when handled under good commercial conditions. 



11. Moisture percentages, as provided for in these grade specifications, shall conform 



to results obtained by the standard method and tester as described in Circular 

 No. 72, Bureau of Plant Industry, United States Department of Agriculture. 



Composition and Feeding Value of Corn. — The following is a com- 

 pilation of American analyses of the grain of the three principal types 

 of corn and the stalks of dent corn, under three conditions: 



Composition of Corn (Maize). 



The following tabulation gives the farm value and feeding value of 

 corn per acre as compared with oats, wheat and hay, when grown in a 

 four years' rotation on the limestone soil at the Pennsylvania Experiment 

 Station : 



The Average Annual Yield During 25 Years of 24 Treatments on 36 

 Plats on Each of 4 Tiers at the Pennsylvania Station. 



Average Yield 

 per Acre. 



Pounds. 



Bushels. 



Price 

 per 100 

 pounds. 



Farm 



Value 



per Acre. 



Digest- 

 ible 

 Protein, 

 pounds. 



Energy 



Value, 



therms 



per Acre. 



Corn, ears 



Corn, stover 



Oats, grain 



Oats, straw 



Wheat, grain 



Wheat, straw 



Timothy and clover hay 



3,534 

 2,528 

 1,227 

 1,772 

 1,192 

 2,099 

 3,609 



50.5 

 38 .'i 

 i9.9 



10.75 

 .125 



1.00 

 .125 



1.33 

 .125 

 .50 



$26.51 

 3.16 



12.27 

 2.22 



15.85 

 2.62 



18.05 



160 

 40 



102 

 19 



106 

 8 



135 



3,198 

 671 

 813 

 370 

 985 

 348 



1,232 



