UNITED STATES DEPARTMENT OP AGRICULTURE 

 BULLETIN No. 1105 



Washington, D. C. T April 27, 1923 



NATURAL REPRODUCTION 



OF WESTERN YELLOW PINE 



IN THE SOUTHWEST 



By 



G. A. PEARSON, SUviculturist 



Fort Valley Forest Experiment Station 



Forest Service 



CONTENTS 



Page. 



Purpose of Study 1 



ReTiew of PreTiooa InTestigations 2 



Recent Developments in the Stadf 4 



Factors Inflaenciiig Reprodnctioo 9 



Seed Supply 9 



Climate 22 



Sofl 29 



Herbaceous Yegetatlon 38 



Cutting 56 



Brush Disposal 92 



Grazing 115 



Miscellaneous Enemies 133 



Summary 135 



Literature Cited 142 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1923 



