CORN 



191 



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

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

 that the finely broken corn aa 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, oilier grains, etc., and the coarsely broken or 

 "cracked" corn, as provided for under the various grades shall l>e 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). 



Number of analyses 



Water 



Ash 



Protein (Nitrogen xG.25) . 



Crude fiber 



Nitrogen-free extract .... 

 Fat 



Stover. 



Field 

 Cured. 



60. 



40.1 

 3.4 

 3.8 



19.7 



31.9 

 1.1 



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. 



Corn, ears 



Corn, stover 



Oats, grain 



Oats, straw 



Wheat, grain 



Wheat, straw 



Timothy and clover hay 



Energy 

 Value, 



therms 

 per Acre. 



3,198 

 671 

 813 

 370 

 985 

 348 



1,232 



