Vol. XXVII 
FEBRUARY 9, 1924 
No. 6 
JOURNAL OF 
AGRICULTURAL 
RESEARCH 
CONTENTS 
% -- „ - Pag® 
Selective Fertilization in Cotton - - - - - - 329 
THOMAS H. KEARNEY and GEORGE J. HARRISON 
(Contribution from Bureau oi Plant Industry) 
The Effect of Fertilizers on the Development of Stem Fust of 
Wheat •* ■■ — — — — - - • — » 341 
E. C. STAKMAN and O. S. AAMODT 
(Contribution from Bureau of Plant Industry and Minnesota Agricultural Experiment Station) 
Morphological and Physiological Studied on the Resistance of 
Wheat to Puccinia graminis tritici (Erikss. and Hejnn.) - - 381 
C.R. HURSH 
(Contribution from Bureau of Plant Industry and Minnesota Agricultural Experiment Station) 
■ ‘ \ 'w ■' ' r "*\■■ J ■ ..■ / ; ^Vvv'o'' v " * . 
The Function of Grit in the Gizzard of the Fowl -- - - 413 
B.F.KAUPP 
(Contribution from North Carolina Agricultural Experiment Station) 
The Association of Manganese with Vitamins - 417 
J. S. McHARGUE 
(Contribution from Kentucky Agricultural Experiment Station) ~ > 
PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE 
WITH THE COOPERATION OF THE ASSOCIATION 
OF LANDGRANT COLLEGES 
WASHINGTON, D. C* 
GOVERNMENT PRINTING OFFICE 
