Vol. XII JANUARY 2S, 1918 No. 4 



JOURNAL OP 



AGRICULTURAL 

 RESEARCH 



COISTXE^NTS 



Pag* 



A Study of the Plow Bottom and Its Action Upon the 



Furrow Slice ----- _ _ - 149 



E. A. WHITE 



( Contribution from Cornell University Agricultural Experiment Station ) 



Influence of Nitrates on Nitrogen-Assimilating Bacteria - 183 



T. L. HXLLS 



(Contribution bom Wisconsin Agricultural Experiment Station) 



PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE. 



WITH THE COOPERATION OF THE ASSOCIATION OF AMERICAN 



AGRICULTURAL COLLEGES AND EXPERIMENT STATIONS 



WASHINOXON, r>. C. 



WASHINQTON : GOVERNMENT PRINTINQ OFFICE : Itit 



