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peterson. PROBLEM OF GULLYING 



[Ch. 23 



Fig. 4(a). Showing lack of vegetative 

 recovery in fenced plot located in Free- 

 man Flat near Safford, Arizona. Grazing 

 has been excluded for 14 years. Altitude 

 3,000 feet. Average annual precipitation 

 about 10 inches. Photo taken October 

 1948. 



Fig. 4(6). Shows excellent grass recov- 

 ery in Steamboat demonstration area, 

 Navajo Indian Reservation, west of 

 Ganado, Arizona. Area reportedly bar- 

 ren in 1934. Grazing has been regulated 

 but not excluded. Altitude 6,500 feet. 

 Average annual precipitation about 16 

 inches. Photo taken September 1948. 



Fig. 4(c). Sparse vegetation on Ft. 

 Bayard Military Reservation near Silver 

 City, New Mexico. Grazing has been 

 strictly regulated for past several dec- 

 ades. Altitude 6,200 feet. Average an- 

 nual precipitation 17 inches. Photo 

 taken September 1948. 



