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v * ■ ■■ 
Vol. XXX JANUARY 1, 1925 No.' 1 
I 
■ JOURNAL OF 
AGRICU 
RESEARCH 
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" 'r, at t 
* t 
CONTENTS 
Page 
A Study of Variability in the Burt Oat - - - -- -- -- - 1 
FRANKLIN A. COFFMAN, JOHN H. PARKER, and KARL S. QUISENBERRY 
The Composite Life History of Puccinia podophylli Schw..- 65 
H. H. WHETZEL, H. S. JACKSON, and E. B. MAINS 
Effect of Height of Chipping on Oleoresin Production - - - - - - 81 
ELOISE GERRY 
The Effect of Bacterial Numbers on the Nodulation of Virginia Soybeans 95 
ALFRED T. PERKINS 
PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE 
WITH THE COOPERATION OF THE ASSOCIATION 
OF LAND-GRANT COLLEGES 
WASHINGTON, D. C. 
GOVERNMENT PRINTING OFFICE 
1925 
