308 BOARD OF AGRICULTURE. 



In this experiment Mr. Deoring separated the sound corn from the 

 soft and weighed each kind. The amount of sound corn was not in 

 proportion to the total weight of ears, but was greatest on the plots 

 to which the ground bone was applied, the next largest amount be- 

 ing found in the plots receiving the bone black and muriate of potash. 

 The following were the average weights of sound shelled corn grown 

 with the various fertilizers : 



No fertilizer, i{9. 3 bushels; dissolved bone black, 33.3 bushels; 

 dissolved bone black and muriate of potash, 42.6 Inishels ; dissolved 

 bone black, muriate of potash and sulphate of ammonia, 37.3 

 bushels; ground bone, 46.6 bushels. 



Mr. Deering's observation was that while the growth was luxuriant 

 where the complete fertilizer was applied, the ammonia salt seemed 

 to retard the ripening of the crop. 



It should be noted that this experiment was performed on land 

 capable of feeding a good crop without the aid of manure, so that 

 the application of the fertilizers caused but small increased growth. 



