HARRY V. HARLAN, Agronomist in Charge of Barley 

 Investigations, Office of Cereal Investigations 



CONTENTS 



Varieties of Barley 1 



Review of the Literature 3 



Variable Factors in Cultivated Barley . . 5 



Scheme of Classification 8 



Lines for Further Study 25 



Identification of Thrashed Material . . 26 



Varieties Grown in Field Culture in the 



United States 28 



Key to Commercial Varieties ..... 28 



Summary 30 



Literature Cited 31 



WASHINGTON 

 GOVERNMENT PRINTING OFFICE 



1918 



