144 



ANNUAL. REPORT OF THE 



Off. Doc. 



Average Yield of Oats, 1887-91-95. 



5 



a 



I 



I 



"3 



o 



Soluble PjOe, dissolved bone black. 

 Reverted PjOo, dissolved bone black 



Insoluble PjOj, ground bone 



Insoluble P2O1S, S. C. rock 



No phosphoric acid, 



Nothing, 



2,737 

 2,833 

 8,175 

 3,101 

 2,674 

 2,337 



Wheat: The average for the three years shows the greatest yield 

 to have been given by insoluble phosphoric acid from ground bone, 

 31.58 bushels of grain and 3,339 pounds of straw. Insoluble phos- 

 phoric acid in the form of dissolved rock gave practically as good 

 results. 



Grass: In case of grass, taking the 'average for three years, the 

 l&rgest yield is 3,365 lbs., is given by insoluble phosphoric acid from 

 ground bone, followed by reverted phosphoric acid. Insoluble phos- 

 phoric acid in the form of South Carolina rock gave the smallest 

 yield, 3,133 lbs., but the difference was not sufficient, however, to pay 

 for the extra cost of the soluble phosphoric acid. Although there 

 was no fertilizer applied directly to the grass there was a larger 

 increase due to the effect of the fertilizer applied to the wheat than 

 there was in the case of the wheat — the crop that received the ap- 

 plication of the fertilizer. 



Corn: The largest yield of grain in case of corn, 51.96 bushels, as 

 well as stover was from insoluble phosphoric acid ground bone. 

 Insoluble phosphoric acid. South Carolina rock, gave the smallest 

 yield of grain and stover although, as in case of grass, the difference 

 was not large enough to pay for the extra cost of the fertilizer. 



Oats: The largest yield of oats was from insoluble phosphoric 

 acid ground bone followed very closely by South Carolina rock. 



In order to reduce these results to a common denomination, a 

 money value has been placed upon all the crops grown and upon the 

 fertilizer used. The prices selected for hay and grain are those re- 

 ported by the statistician of the U. S. Department of Agriculture, 

 as the average selling price in Pennsylvania. 



In case of straw and stover, the approximate selling prices in the 

 community are taken. In computing the values of the various crops 

 the average price for the entire period of 12 years has been used. 

 In case of the fertilizers, the average valuation given the various fer- 

 tilizer ingredients during this period have been used. The follow- 

 ing table gives a summary of these values: 



