U. S. DEPARTMENT OF AGRICULTURE. 



BUREAU OF PLANT INDUSTRY— BULLETIN NO. 211. 



B. T. GALLOWAY, Chief of Bureau. 



BACTERIOLOGICAL STUDIES OF THE SOILS OF 

 THE TRUCKEE-CARSON IRRIGATION 



PROJECT. 



BY 



KARL F. KELLERMAN, 



Physiologist in Charge, of Soil-Buctrriolog!/ and Water- Purification Investigations, 



AND 



E. R. ALLEN, 



Scientific Assistant. 



Issued Aphii, 15, 1911, 



WASHINGTON: 



GOVKRNMENT PRINTING OFFICE. 



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