76 PRINCIPLES OF FARM PRACTICE 



has shown are suited to a locality. Where there is any doubt 

 as to the variety to use, the State Agricultural Experiment 

 Station should be consulted. Corn growers' associations, 

 such as the Wisconsin Associations, are doing much, by 

 making careful tests, to find varieties adapted to special 

 regions. In the Far North, as Northern New England, 

 Northern New York, Michigan, Wisconsin, Minnesota, and 

 North Dakota, flint corn is generally used instead of dent 

 corn. Flint corn does not yield so well as dent corn, but it 



is able to mature in those 

 8 - 90 >86 _ northern sections because 



f *ts snor t growing season. 

 Sweet corn and pop corn 

 are used only as special 

 crops, not in general farm- 

 ing except for home use 

 and for cash crops. There 



ar6 S6Veral Varieties of 



03 '06 '07 '08 '09 MO 1 1 -| 2 '13 '14 '15 



Graph showing fluctuations in, prices eadl > affording ^ COnsidera- 



of corn and hogs over a series of years, ble range in choice to meet 



Note that a variation in the price of corn <, npr : a i nppr i<i ~ nr | rKmntir 



is followed later by a similar variation S P C 



in price of hogs until 1914. Here this Conditions. 

 relation is disturbed, probably due to There are two Other 

 the beginning of the Great War. 



kinds of corn, but they are 



of little importance compared with the ones already men- 

 tioned; pod corn, distinguished by a husk around each grain, 

 and soft corn, which, as its name indicates, is free from the 

 hard covering of the kernels. 



Climate. That corn is extensively raised in all the states 

 east of the Rocky Mountains, is shown by the map giving 

 the distribution of com production in the United States. In 

 the extreme northern parts of the states on the Canadian 



