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 
By 
BENTON E. ROTHGEB, formerly Assistant 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 Amarillo Cereal Field 
Station 2 
Location .2 
Physical Factors 4 
Experimental Methods 11 
Plat Experiments 11 
Crop Rotation 11 
Method of Seeding 11 
Methods of Obtaining Data ..... 11 
Environing Conditions 12 
Date-of -Seeding Experiments 13 
Dwarf Milo 14 
Feterita * 17 
Page 
Date-of-Seeding Experiments— Ccmd 
Dawn Kafir 18 
Manchu Kaoliang 20 
Comparative Yields in Date-of-Seed- 
ing Experiments 21 
Spacing Experiments 23 
Dwarf Milo . . . . f 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 
