Table 1. 
      
  
Categorization of the Oklahoma Agrophysical 
Units into the Type and Percent Small Grains 
  
APU 1-2 
APU 60 
APU 7 
APU 9 
Less than 5 percent agriculture with most 
counties having less than 1 percent wheat 
or small grains. 
»90 percent of small grains is winter 
wheat except Harmon, Beckman, and Roger 
Mills counties which contain greater 
than 10 percent winter rye. 
>90 percent of small grains is winter 
wheat. In northern counties, 50-60 
percent of the total agricultural land 
is in wheat. 
>90 percent of small grains is winter 
wheat. 
APU-7