Vol. XV 0CX0BE:R 2S, 1918 No. 4 



JOURNAL OP 



AGRICULTURAL 

 RESEARCH 



CONTENXS 



Page 



Plasticity of Biologic Forms of Puccinia graminis - - 221 

 E. C. STAKMAN, F. J. PIEMEISEL, and M. N. LEVINE 



(Contribution from Minnesota Agricultuial Experiment Station) 



Experiments in Field Technic in Plot Tests - - - 251 



A. C. ARNY and H. K. HAYES 



(Contribution from Minnesota Agricultural Experiment Station) 



PUBUSHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE, 



WITH THE COOPERATION OF THE ASSOCUTION OF AMERICAN 



AGRICULTURAL COLLEGES AND EXPERIMENT STATIONS 



WASHINGTON, D. C. 



WASHINQTON : OOVCtlNMeNT PI^INTINO OFFICE : 1918 



