UNITED STATES DEPARTMENT OF AGRICULTURE 

 BULLETIN No. 976 



Contribution from the Bureau of Plant Industry / 

 WM. A/TAYLOR, Chief 



Washington, D. C. 



PROFESSIONAL PAPER 



January 20, 1922 



CULTURAL EXPERIMENTS 



WITH GRAIN SORGHUMS IN THE 



TEXAS PANHANDLE 



BENTON E. ROTHGEB, formerly Assisfant Agronomist in 

 Charge of Grain- Sorghum and Broom-Corn Investi- 

 gations, Office of Cereal Investigations 



CONTENTS 



Page 



History of the Experiments 1 



Description of the Araarillo Cereal Field 



Station 2 



Location 2 



Physical Factors .' . . . 4 



Experimental Methods . , 1 



Plat Experiments I 



Crop Rotation 1 



Method of Seeding 1 



Methods of Obtaining Data 1 



Environing Conditions 12 



Date -of -Seeding Experiments 13 



Dwarf Miio 14 



Feterita . • 17 



Page 

 Date-of-Seeding Experiments— Contd 



Dawn Kafir 18 



Manchu Kaoliang 20 



Comparative Yields in Date-of-Seed- 

 ing Experiments 21 



Spacing Experiments " 23 



Dwarf Milo 23 



Dawn Kafir 30 



Environmental Experiments 36 



Agronomic Data 38 



Chemical Composition 39 



Summary 41 



Publications on the Grain Sorghums . . 43 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1922 



