UNITED STATES DEPARTMENT OF AGRICULTURE 



BULLETIN No. 367 



Contribution from the Bureau of Plant Industry 

 WM. A. TAYLOR, Chief 



PROFESSIONAL PAPER 



June 23, 1916 



CARRYING CAPACITY OF 



GRAZING RANGES IN SOUTHERN 



ARIZONA 



By 



E. O. WOOTON, Agriculturist, Office of Farm Management 



CONTENTS 



Introduction 



Ciimatic Conditions 



Character and Distribution of Forage 

 Nature and Rate of the Recovery . 



Page 

 1 

 6 

 9 



. 16 



Carrying Capacity . 18 



The Most Important Factor Governing 

 Possible Improvement of the Range . 22 



Hay-Cutting Operations 23 



Grazing Experiments 28 



Miscellaneous Notes 33 



Future Investigations ....... 36 



Summary and Conclusions 36 



List of Publications Relating to tiiis Sub- 

 ject 40 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1916 



