BULLETIN No. 165 NOVEMBER, 1915 



MASSACHUSETTS 

 AGRICULTURAL EXPERiMENT STATION. 



THE EFFECT OF SULFATE OF AMMONIA 



ON SOIL. 



By R. W. Ruprecht and F. W. Morse. 



This bulletin is a record of efforts to determine the changes 

 which have been produced in a soil by years of continuous use of 

 sulfate of ammonia as a fertilizer. Treatment of soils with solu- 

 tions of the sulfate of ammonia, and analyses of the drainage 

 waters from the fertilizer plots, show that sulfate of calcium is 

 readily formed and removed when lime is present, while after the 

 exhaustion of the lime there is the formation of salts of iron and 

 aluminium. Culture studies with seedling plants and solutions of 

 iron sulfate and of alum show injurious action of the salts on the 

 roots. 



Requests for bulletins should be addressed to the 



Agricultural Experiment Station, 



Amherst, Mass. 



