HARVESTING AND STORING THE CORN CROP 263 



of eight years' results on the shrinkage of stored corn at 

 the Iowa Station is given: 



TABLE 27. AVERAGE OF EIGHT YEARS' RESULTS ON SHRINKAGE 

 OF STORED CORN AT THE IOWA STATION, GIVEN BY MONTHS 



318. Measuring corn in the crib. A rule for measur- 

 ing corn in the crib can be only approximately correct as the 

 moisture content and hence the weight per unit volume of 

 stored corn varies considerably. Usually a bushel of husked 

 ear-corn will occupy approximately 2J^ cubic feet of space. 

 C. S. Plumb in his book on " Indian Corn Culture " gives the 

 following rule for measuring husked ear-corn in the crib: 

 "Multiply the length, breadth and height of the crib to- 

 gether in feet to obtain the cubic feet of space it contains. 

 Multiply this product by four (4), strike off the right-hand 

 figure, and the result will be the number of shelled bushels." 

 This rule really figures 2J^ cubic feet of corn as a bushel. 

 The legal weight of a bushel of corn when dry and sound is 

 56 pounds of shelled corn or 70 pounds of ear-corn. 



