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 333 



Massachusetts 

 Agricultural Experiment Station 



BULLETIN No. 333 JULY 1936 



A Study in Soil Nitrogen 



By F.W. Morse 



No plant food element has received and deserved more consideration 

 than nitrogen. The part that Massachusetts Agricultural Experiment 

 Station has contributed in an attempt to assign to it a correct place 

 in economic plant production is here further recorded. 



MASSACHUSETTS STATE COLLEGE 

 AMHERST, MASS. 



