Bulletin 170 



May. 1914 



NE\^ HAMPSHIRE AGRICULTURAL 

 EXPERIMENT STATION 



GRANITIC SOIL POTASSIUM AND 

 ITS RELATION TO THE PRO- 

 DUCTION OF HAY 



By B. E CURRY and T. O. SMITH 



NEW HAMPSHIRE COLLEGE 



OF 



AGRICULTURE AND THE MECHANIC ARTS 



DURHAM, N. H. 



