UNITED STATES DEPARTMENT OF AGRICULTURE 
BULLETIN No. 618 
Contribution from the Bureau of Plant Industry 
WM. A. TAYLOR, Chief 
Washington, D. C. 
PROFESSIONAL PAPER 
March 13, 1918 
EXPERIMENTS WITH DURUM WHEAT 
A 
By 
CARLETON R, BALL, Agronomist In Charge, and J. ALLEN CLARK 
Scientific Assistant, Western Wheat Investigations 
Office of Cereal Investigations 
CONTENTS 
Introduction 
Sources of Data 
History . 
Agronomic Adaptation ar.d Production 
Adaptation 
Production 
Description and Key 9 
Varietal Experiments 13 
Geographic Scope 13 
Results Obtained 16 
Summary of Results 57 
Bibliography 61 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1913 
