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U. S. DEPARTMENT OF AGRICULi^^©veo ^ 



BUREAU OF PLANT INDUSTRY— Circular W^MLX g \QAA M 



B. T. GALLOWAY, Chief of Bur^/ a "^^ 



£^fT. 



or A6W»>V 



LLANEOUS^ PAPERS 



Soil Bacteriology as a Factor in Crop Production . . . . li. F. KELLERMAN 

 A New Ornamental Palmetto in Southern Texas . . . . . . 0. F. COOK 



Commercial Truck Crops on the TruckeC'Carson Project 



fF. B. HEADLEYand 

 I VINCENT FULKERSON 



A Purple-Leaved Mutation in Hemp . . L. H. DEWEY 



The Tuber-Unit Method of Seed-Potato Improvement . . WILLIAM STUART 



Issued February 15, 1913. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 



1913. 



