PREFACE vii 



the recognition of the early stages of pasture-forage decline; 

 the leading introduced forage plants and their culture; the 

 adequate protection of timber reproduction against grazing on 

 potential timberlands; the burning of pasture lands and its 

 effect on forage yields; the poisonous-plant menace and its con- 

 trol; forage estimates and grazing capacity; methods of study- 

 ing revegetational problems; and, finally, the educational 

 phase, which embraces suggestions for instruction in pasture 

 management and livestock production. 



It is hoped that students of pasture management will avail 

 themselves of the literature referred to in the discussion of the 

 subject and at the end of the chapters. Although reluctant to 

 do so, the author has been forced to cite his own writings some- 

 what freely, because, the critical study of range management 

 having been so recently begun, only a small amount of literature 

 bearing directly upon the development of the subject has been 

 produced. 



Among the most valuable features of the book are its nu- 

 merous illustrations, nearly all of which are original. The 

 plate showing the main stock-poisoning plants in their natural 

 colors should prove especially helpful to stockmen as well as 

 to students in the classroom. 



The author takes this opportunity to express his gratitude to 

 Mr. William A. Dayton, of the Forest Service, and others 

 who have rendered valuable assistance by reading and criti- 

 cizing portions of the manuscript. Grateful acknowledgment 

 is made especially to Mr. Arthur Charles Watkins, of the 

 Forest Service, who has critically read both the manuscript 

 and proofs, and to Mrs. A. E. Hoyle, who has prepared most 

 of the pen and ink illustrations. 



Companion volumes entitled " Native American Forage 

 Plants" and "Livestock Husbandry on Range and Pasture" 

 are expected to appear in the near future. 



ARTHUR W. SAMPSON. 



The University of California, 

 May, 1923. 



