138 MAINE STATE COLLEGE 



Two plots were to receive finely ground South Carolina rock at 

 the rate of 1000 pounds per acre, with sulphate of amm nia at ihe 

 rate of 150 pounds and muriate of potash at the rate of 100 

 pounds per acre. This would give to these two plots the same 

 amount of potash and nitrogen as the plots to which the acid 

 vSouth Carolina rock was applied and four times as much phosphoric 

 acid, but the phosphoric acid would be in an insoluble form. The 

 cost of the phosphoric would be about the same in each case. 



Two plots were to receive ground Caribbean Sea guano at the 

 rate of 725 pounds per acre with the same amount of sulphate of 

 ammonia and muriate of potash as in the preceding cases. This 

 also provides for four times the amount of phosphoric acid in an 

 insoluble form as would be applied of soluble phosphoric acid 

 where the acid South Carolina rock was used, at about the same 

 cost per plot. 



Two plots were to be cultivated with an application of 150 

 pounds of sulphate of ammonia and 100 pounds of muriate of 

 potash, to show to what extent the phosphates increased the crop 

 in each case over what would have been produced if they had not 

 been applied. 



In addition two plots were to be cultivated without manure, to 

 determine tlie capacity of the soil to produce crops at the time of 

 the experiment. 



Sets of fertilizers like those described above were sent out to 

 four farmers in different parts of the State, with dire tions for 

 their application. Three of these farmers have furnished reports 

 of their work which are of considerable interest. In each case 

 one-half of the fertilizers were applied broad cast and the 

 remainder in the hill. 



Following are given the reports of the farmers having cliai'ge of 

 the work. 



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