Vol. XVI 



JANUARY 13, 1919 



No. 2 



JOURNAL OP 



AGRICULTURAL 



RESEARCH 



COISrXE^NTS 



Pt8« 



Nitrates, Nitrification, and Bacterial Contents of Five 

 Typical Acid Soils as Affected by Lime, Fertilizer, 

 Crops, and Moisture ___--- 27 



H. A. NOYES and S. D. CONNER 



(.Contribution from Indiana Agricultural Experiment Station) 



Effect of Certain Ecological Factors on the Morphology of 

 the Urediniospores of Puccinia graminis - - 

 E. C. STAKMAN and M. N. LEVINE 

 ( Contribtition from Minnesota Agricultural Experiment Station ) 



43 



PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE, 



WITH THE COOPERATION OF THE ASSOCIATION OF AMERICAN 



AGRICULTURAL COLLEGES AND EXPERIMENT STATIONS 



WASMINOXON, D. C. 



WASHIHQTON t OOVERMMENT PRINTINO OFFICE : I»I8 



