Bulletin 77. 
February, 1903. 
The Agricultural Experiment Station 
OF THE 
Agricultural College of Colorado. 
Investigation of the Great Plains. 
Unirrigated Lands of Eastern Colorado. 
Seven Years’ Study. 
—BY— 
J. E. PAYNE. 
PUBLISHED BY THE EXPERIMENT STATION 
Fort Collins, Colorado. 
1903 . 
