Vol. XVII JUNE 16, 1919 No. 3 



JOURNAL OF 



AGRICULTURAL 



RESEARCH 



CONXEMSTTS 



Page 



Relation of Sulphates to Plant Growth and Composition - 87 



H. G. MILLER 



( Contribution from Oregon Agricultural Experiment Station ) 



Relation of Weather to Fruitfulness in the Plum - - 103 



M. J. DORSEY 



( Contribution from Minnesota Agricultural Experiment Station ) 



Structure of the Maize Ear as Indicated in Zea-Euchlaena 

 Hybrids •• 127 



G. N. COLLINS 

 (Contribution from Bureau of Plant Industry) 



PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE, 



WITH THE COOPERATION OF THE ASSOCIATION OF AMERICAN 



AGRICULTURAL COLLEGES AND EXPERIMENT STATIONS 



WASHINGTON, T>, C. 



WASHINGTON : GOVERNMENT PRINTING OFFICE : 1(18 



