18 a 



EXPERIMENT STATION, 



[Jan. 



column "Increase due to the use of fertilizers" are obtained 

 by subtracting 2,000 pounds from the preceding column, 

 "Yield per acre of hay and rowen." It is generally considered 

 by all who are familiar with this field that it would produce 

 better than one ton per acre of hay and rowen without any 

 fertilizer. Wishing to be on the conservative side, it was 

 assumed that this area w^ould produce one ton per acre without 

 any fertilizer; and therefore the figures in this column, 2,000 

 pounds less than the total product of hay and rowen, are 

 assumed to represent the increase due to the use of fertilizer. 

 The labor of harvesting the crop has not been considered in 

 the following table. This item will vary greatly on different 

 farms, but must be considered in judging the real economy 

 of any scheme of fertilization. 



Table III. — Increase in Yield due to the Use of Fertilizer. — Its Value 



arid Cost. 



Year. 



Fertilizers. 



Hay and 



Rowen 



(Average 



Yields per 



Acre). 



Cost of 

 Fertilizers 



and 

 Applica- 

 tion. 



1911 



1912 



1913 



1915 



Manure, 



Bone and potash 



Ashes, 



Manure, 



Bone and potash 



Slag and potash 



Manure, 



Bone and potash 



Slag and potash 



Manure, 



Bone and potash 



Slag and potash 



Maniire, 



Bone and potash 



Slag and potash 



3,933 



4,846 



4,610 



6,079 



$15 67 



15 20 



15 20 



15 20 



15 20 



The area of plot 1 is 3.97 acres; of plot 2, 2.59 acres; and 

 of plot 3, 3 acres; and it undoubtedly will be asked whether 

 the soil is of uniform character, and whether all three plots 

 are equally well suited for the production of hay. In Table IV. 

 are presented data for a period of twenty-three years (1896- 

 1918) in answer to this question. 



