52 



SUCCESSFUL FARMING 



crib until reasonably well cured. If very wet when cribbed it is likely 

 to mould and decay. Ear corn at husking time will contain 15 to 40 per 

 cent of moisture, depending on conditions. After standing for six months 

 or more in the crib, the moisture, under normal conditions, will range 

 from 10 to 12 per cent. After this time shrinkage from loss of moisture 

 will be slight. 



Shrinkage of Corn. — A knowledge of the average shrinkage of corn 

 is important in connection with future prices, and should be taken into 

 consideration by the farmer in connection with the holding of corn for a 

 future market. The table on preceding page shows the average shrink- 

 age of corn at the Iowa Experiment Station as determined for eight 

 successive years. 



Market Grades of Corn. — According to the act of Congress of 

 June 30, 1906, and March 4, 1913, the Secretary of Agriculture has 

 fixed the following definite grades of grain, which went into effect on 

 July 1, 1914: 



* Exclusive of neat-damaged or mahogany kernels. 



t May include heat-damaged or mahogany kernels not to exceed the percentage indicated. 



"Sample" — See General Rule No. 6 for sample grade. 



GENERAL RULES 



1. The corn in grades No. 1 to No. 5, inclusive, must be'sweet. 



2. White corn, all grades, shall be at least 98 per cent white. 



3. Yellow corn, all grades, shall be at least 95 per cent yellow. 



4. Mixed corn, all grades, shall include corn of various colors not coming within the 



limits for color as provided for under white or yellow corn. 



5. In addition to the various limits indicated, No. 6 corn may be musty, sour, and 



may also include corn of inferior quality, such as immature and badly blistered. 



6. All corn that does not meet the requirements of either of the six numerical grades, 



by reason of an excessive percentage of moisture, damaged kernels, foreign 

 matter, or "cracked corn," corn that is hot, heat-damaged, fire-burnt, infested 

 with live weevil, or otherwise of distinctly low quality, shall be classed as 

 sample grade. 



7. In No. 6 and sample grade, reasons for so grading shall be stated on the inspector's 



certificate. 



8. Finely broken corn shall include all broken particles of corn that will pass through 



a perforated metal sieve with round holes ^ of an inch in diameter. 



