Environmental analysis shows the way to more effective management of critical wildlife areas. The Colorado Unit, 

 under AEC contract and in a cooperative projeel with the Colorado Game. Fish, and Parks Department, concluded a 

 comprehensive study of a selected mule deer winter range that involved the measurement of weather, vegetational, 

 topographic, and soil factors, correlated with deer use and behavior on the area. (Photos by Lee E. Yeager) 



lift-/ 



In range studies nn the Public Lands, the Bureau cooperates with the U.S. Forest Service or the 



Bureau of Land Management and usually with the states involved. Here, forage production 



and utilization are Under measurement on heavily used elk range ill Idaho (left), and on a critical 

 deer winter range in Utah. (Photos by Paul 1>. Dalke. left: W. L. Kobinette, right) 



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