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Massachusetts 

 Agricultural Experiment Station 



Bulletin No. 276 June, 1931 



Increasing Soil Acidity as a Means 



of Controlling Black Root'Rot 



of Tobacco 



By William L. Doran 



Soils with a pH value of about 5.9 or higher are favorable to the 

 growth of the fungus which causes black root-rot and are therefore un- 

 safe for tobacco. The primary object of the work here described was to 

 study means of lowering the pH value of soil infested with Thielavia 

 basicola, and thereby decreasing the loss caused by black root-rot of 

 tobacco. 



MASSACHUSETTS STATE COLLEGE 

 AMHERST, MASS. 



