90 FIELD CROPS 



Specifications for No. 2, No. o, No. 4, No. 5, and No. 6 

 in each class are similar, differing as follows: 



The minimum test weights per bushel are, No. 2, 53 pounds; No. 

 3, 51 pounds; No. 4, 49 pounds; No. 5, 47 pounds; No. 6, 44 pounds. 



The maximum percentages of moisture are, No. 2, 14; No. 3, 15.5; 

 No. 4, 17.5; No. 5, 21.5; and No. 6, 23.0. 



The maximum percentages of foreign matter and cracked corn are. 

 No. 2, 3; No. 3, 4; No. 4, 5; No. 5, 6; and No. 6, 7. 



The maximum percentages of damaged kernels are, No. 2, 4; No. 



3, 6; No. 4, 8; No. 5, 10; and No. 6, 15. Of these, 0.1 per cent may he 

 heat damaged in No. 2 corn, 0.3 per cent in No. 3, 0.5 per cent in No. 



4, 1 per cent in No. 5, and 3 per cent in No. 6. 



Sample grade corn is any corn which does not come within the re- 

 quirements of any of the grades from No. 1 to No. 6, inclusive, or which 

 has any commercially objectionable foreign odor, or is heating, hot, in- 

 fested with hve weevils or other insects injurious to stored grain, or is 

 otherwise of distinctively low quality. 



Corn of No. 6 grade may he musty or sour; all higher grades must 

 be cool and sweet. 



The greater part of the corn which reaches the Chicago 

 market is No. 2 and No. 3 ^^ellow, the quantities of these two 

 grades usualty being about the same. Three or four times 

 as much yellow as white corn is marketed in Chicago. The 

 usual difference in feeding value between No. 2 and No. 3 

 corn is about 2 cents a bushel, but the difference in market 

 price may consideral )ly exceed this figure. The lowest 

 price recorded for No. 2 corn on the Chicago market in the 

 five years from 1913 to 1917 was 461^ cents in 1913; the high- 

 est, $2.36 in 1917. The average of the annual lowest prices for 

 the five years was 65.6 cents; of the highest prices, 118.7 cents. 



114. Exports. Though the United States produces 

 about three fourths of the world's crop of corn, a veiy small 

 portion of the crop is normally exported. In the five years 

 from 1909 to 1913, the average annual exportation of corn 

 from the United States was 45.054,000 bushels, while Argen- 

 tina exported 115,749,000 bushels annually during this period. 

 No other country was a considerable factor in the world's 

 trade in corn, the two just named furnishing about 60 per 



