Vol. XXII OCTOBER 8, 1921 No. 2 



JOURNAL OF 



AGRICULTURAL 



RESEARCH 



CONTENTS 



Page 



Comparative Vigor of Fi Wheat Crosses and Their 

 Parents - - -- - -- - - 53 



FRED GRIFFEE 



(Contribution from Minnesota Agricultural Experiment Station) 



Temperature and Humidity Studies of Some Fusaria Rots 

 of the Irish Potato - - - -- - -65 



R. W. GOSS 



( Contribution from Nebraska Agriculttual Kzperiment Station) 



Blackleg Potato Tuber-Rot under Irrigation - - - 81 

 M. SHAPOVALOV and H. A. EDSON 



(Contribution from Bureau of Plant Industry) 



Microscopic Study of Bacteria in Cheese - - - - 93 



G. J. HUCKER 



(Contribution from New York Agricultural Experiment Station) 



Further Studies on Relation of Sulphates to Plant Growth 

 and Composition - -- - - - - - 101 



HARRY G. MILLER 



(Contribution from Oregon Agricultural Experiment Station) 



Soybean Mosaic - -- - - - - -111 



MAX W. GARDNER and JAMES B. KENDRICK 



( Contribution from Indiana Agricultural Experiment Staition) 



PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE' 



WITH THE COOPERATION OF THE ASSOCIATION OF 



LAND-GRANT COLLEGES 



^W^ASHINQXON, D. C, 



