BULLETIN No. 176 OCTOBER, 19(7 



MASSACHISETTS 

 AGRICILTIRAL EXPERIMENT STATION 



The Cause of the Injurious 

 Effect of Sulfate of Am- 

 monia when used 

 as a Fertilizer 



By R. W. RIPRECHT and F. W. MORSE 



This Bulletin is a continuation of Bulletin No. 165, " The Effect 

 of Sulfate of Ammonia on Soil." It shows that soluble salts of 

 iron, manganese and aluminium, severally or collectively, were 

 always found in soils which had been dressed with sulfate of 

 ammonia without an addition of lime, and that these several 

 compounds were positively injurious to clover seedlings in cul- 

 tural experiments. 



Requests for bulletins should be addressed to the 



Agricultural Experiment Station, 



Amherst, Mass. 



