40 BOARD OF AGRICULTURE. 



Six adjoining rows with Superphosphate, eleven bushels of good 



ears, two small or unripe. 

 Sixteen rows with pumpkins, twenty bushels of ears good corn, 



six small or unripe. 

 With Superphosphate, one and five-sixths bushels of ears good 



corn, per row. 

 Without Superphosphate, one and a third bushels of ears good 



corn, per row. 

 With pumpkins, one and a quarter bushels of ears good coi'n per 



row. 



Giving half a bushel to a row more with Superphosphate than 

 without ; and the pumpkins more than neutralized all the good 

 effects of that fertilizer, although they were planted on that part 

 of the field which had the most liberal supply of it. The crop of 

 pumpkins was not worth half as much as the corn was damaged 

 by them. The six rows with Superphosphate which were meas- 

 ured, grew in that part of the field which had the reduced quantity. 



I suppose there is nothing gained by putting plaster with Super- 

 phosphate of lime, as in the manufacture of that article from bones 

 and sulphuric acid, sulphate of lime or gypsum is formed, and 

 becomes a portion of the article as sold. 



Yours truly, 



M. Gould. 



North Bridgton, Jan. 22, 1863, 



Mr. Rogers gave the result of an experiment he had made with 

 concentrated manure upon potatoes. The soil a clayey loam ; the 

 land prepared and seeded in every way precisely alike, the only 

 difference in treatment being in the different kinds of manure 

 applied. 



A given number of rows produced with no manure, seven-eighths 



bushel. 

 American guano, one and a half bushels. Increase seventy-one 



per cent. 

 Coe's Superphosphate, two bushels. Increase one hundred and 



twenty-nine per cent. 



The concentrated manure was applied at the rate of about five 

 hundred pounds per acre, and a larger proportion of merchantable 

 potatoes were found in the rows manured with the American guano. 



