BULLETIN No. 161 APRIL, 19 15 



MASSACHISETTS 

 AGRICILTIRAL EXPERIMENT STATION 



The Effect on a Crop of Clover of 

 Liming the Soil 



By F. W. MORSE 



AND 



Toxic Effect of Iron and Aluminum 

 Salts on Clover Seedlings 



By R. W. RIPRECHT 



This bulletin shows that liming a soil increases the size of clover 

 plants and the percentage of nitrogen in them when the clover 

 was grown on soils without an application of nitrogen or when 

 supplied with sulfate of ammonia. The increase in the assimila- 

 tion of nitrogen was apparently promoted by the action of the lime 

 on the properties of the soil and not by its action within the plants. 



Sulfate of iron and sulfate of aluminum are shown to be very 

 harmful to the roots of clover plants. Carbonate and hydrate of 

 lime neutralize the injurious properties of the salts of iron and 

 aluminum in dilute solutions. 



Requests for bulletins should be addressed to the 



Agricultural Experiment Station, 



Amherst, Mass. 



