UNITED STATES DEPARTMENT OF AGRICULTURE 

 BULLETIN No. 836 



Contribution from the Bureau of Plant Industry 

 WM. A. TAYLOR, Chief 



Washington, D. C. 



PROFESSIONAL PAPER 



April 27, 1920 



BROOM-CORN EXPERIMENTS AT WOOD- 

 WARD, OKLAHOMA 



By 



BENTON E. ROTHGEB, Assistant Agronomist in Charge of Grain- 

 Sorghum and Broom-Corn Investigations, and JOHN B. 

 SIEGLINGER, Assistant Agriculturist, Office 

 of Cereal Investigations 



CONTENTS 



Page 



Experiments with Broom Corn .... 1 



Description of the District 2 



Topography 2 



Soil 2 



Climatie Conditions 3 



The Woodward Field Station ... 10 



The Broom Corns 10 



Classification 10 



Experimental Conditions 11 



Varietal Experiments ...... 16 



Date-of-Seeding Experiments . . . 2S 



Page 

 The Broom Corns— Continued. 



Comparative Yields in the Date-of- 



Seeding Experiments 29 



Rate-of-Seeding Experiments ... 80 

 Comparative Yields in the Rate-of- 

 Seeding Experiments 33 



Combined Rate-of-Seeding and Spac- 

 ing Experiments ....... 34 



Harvesting Experiments 47 



Wearing Quality of the Brush ... 49 



Nursery Experiments 49 



Conclusions 63 



WASHINGTON 

 GOVERNMENT PRINTING OFFICE 



1920 



