\ 
ivo^. xkiV 
JiJTNE 16, 1923 
No. 11 
CONTENTS 
, ' . ' > " ' Page 
Morphology and Host Relations of Puccmiastnim sunericanum - 885 / 
. , B.O.DODGE ,, 
( Contribution from Bitreao ef Plant Industry) 
Watery-Rot of Tomato Fruits - - . - - - - - 895^-^ 
FRED J. PRITCHARD and W. S. PORTE 
(Contri^tion from Bureau of Plant Bidttsbry > 
Influence of the Absolute Reaction of a Soil upon Its Azotobacter 
Flora and Nitrogen Fixing Ability - - - - - - 907 
P. L. GAINEY 
« ( Contribution from Kansas Agricultural Experiment Station ) > 
A Study of Factors Affecting the Nitrogen Content of Wheat and 
- of the Cltonges that Occur during the Development of Wheat - 939 
GEORGE A. OISON 
( Contribution from Washington Agricultural Experiment Station) 
Relative Susceptibility of Citrus Fruits and Hybrids to Clado- 
sporium citri Masses - , - _ . - - - - _ 955 ; 
G. 1. PETTIER and W. J. FREDE^CB 
( Contribution from Alabama Agricultural Experiment Station and Bureau of JPIant Indu^ry > 
An Improved Method for the Determination of. fTicotine in , 
Tobacco and Tobacco Extracts - , - • - , - . . - 961 
O. M. SHEDD : 
(Contribution from Kentucky AgriculturalE^eriment Station^ 
.Ntitritive V.altie of Mixtures of Proteins from Corn and Vari()us 
Concentrates - - - - - - . - - • - 971. 
D. BREESE JONES, A. J. FINKS, wd CAM O. JOHNS . 
(Contribution fr<mi Bureauuf Chemistry) / 
% 
PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICULTl®?, 
WITH: THE COOPERATION OF THE ASSOCIATKW 
OF UND-GRANT COLIEGI^ 
•WAStoNGTON.D. C. . 
GOTERNMBWT PRINTING OFFICE 
. 1923 
