New York Agricultural Experiment Station. 118 

 Amounts of Nitrogen Applied and Removed. 



The results which this summarized table present are of ex- 

 ceeding interest, and we call attention to the following points: 



(1) On the plot where no fertilizer was applied, the crop re- 

 moved from one acre of soil 24.8 pounds of nitrogen the first year 

 and 18.7 pounds the second year, making a total of 43.5 pounds 

 for the two years. This practically represents the amount of 

 nitrogen in the soil available for the potato crop at the time un- 

 der the conditions prevailing. 



(2) On the various plots where we applied 1,000 pounds of fer- 

 tilizer in 1895, we supplied from 26.1 to 45 pounds of nitrogen, 

 the average being 36.4 pounds. In 1895 the crop used from 25.9 

 to 84.2 pounds of nitrogen, the average being 81.8 pounds. In 

 1896 the crop used from 21.8 to 29.3 pounds, the average being 

 24.5 pounds. The total amount of nitrogen removed by these 

 two succesive crops amounted to 56.3 pounds an acre. 



(8) On the various plots where we applied per acre 2,000 

 pounds of fertilizer in 1895, we supplied from 52.2 to 90 pounds 

 of nitrogen, the average being 72.8 pounds. In 1895 the crop 

 used from 26 to 38.5 pounds of nitrogen, the average being 32.1 

 pounds; and in 1896 the crop used from 28.8 to 28. 8 pounds, the 

 average being 26.5 pounds. The total amount of nitrogen re- 

 moved by these two successive crops amounted to 58.6 pounds an 

 acre. 



