New York Agricultural Experiment Station. 35 



From the foregoing table we can make the following summarized 

 statement : 



1. The cost of fertilizer for each bushel of potatoes produced 

 varied from 7.96 cents on plot 5 to 24.35 cents on plot 13. In no 

 case was the increase of yield proportionate to the amount of fer- 

 tilizer used when more than 1,000 pounds an acre was applied. 



2. There was in every case an increased yield due to the appli- 

 cation of fertilizer. This increase varied from 5.4: bushels on plot 

 20 to 81.6 on plot 23 over the yield on the unfertilized plots. 



3. The cost of the increased yield due to the use of fertilizers 

 varied from 26.2 cents (on plot 5) to $4:,35 (on plot 21) for each 

 bushel of potatoes produced in excess of the yield of the unferti- 

 lized plots. 



4. The money value of the crojD at 50 cents a bushel varied 

 from $75.30 on plot 1 to $116.55 on plot 23. 



5. If we calculate the amount of money received for extra yield 

 of potatoes due to the use of fertilizers and compare this amount 

 with the money expended for the fertilizers used, we iind that on 

 plot 5 there was the greatest gain, amounting to $13.34 in yield 

 over the cost of fertilizer used. In other words, the extra yield was 

 enough to pay for the fertilizer and $13.34 more. From this 

 amount there was a variation down to an actual loss of $29,05 (on 

 plot 13) ; that is, on this plot the extra yield of potatoes due to the 

 use of fertilizer was insufficient by $29.05 to pay for the fertilizer 

 used. In no ease did an application of 2,000 pounds of fertilizer 

 produce as economical yields as did the application of 1,000 pounds. 

 In every case except two (plats 4 and 23 j, the use of 2,000 pounds was 

 attended by actual loss. 



6. Comparison of Hesults in Applying Fertilizers Broadcast 



AND in the Row. 



On plots 2, 3 and 4 the fertilizer was applied broadcast, while on 

 plots 5, 6 and 7 the applications were made in the row. The 

 amounts of fertilizer applied are given below. 



