JN"ew York Agricultural Experiment Station. 451 



of purity. In the Station experiments the coefficient of purity 

 was. little affected; in the Fayetteville experiments, the co- 

 efficient of purity was lowered by using fertilizers. 



Tabulated Summary Showing Effect of Fertilizers upon Coefficient of 



Purity. 



(4) Effect of fertilizers on cost of cro<p. — The use of 500 

 pounds of fertilizer increased the cost of beets $6.50 an acre; 

 1,000 pounds, $13 an acre; 1,500 pounds, $19.50 an acre; and 

 2,000 pounds, $26 an acre. 



(5) Effect of fertilizers upon money value of crop. — Averag- 

 ing our results we find that the use of 500 pounds of commercial 

 fertilizer increased the yield of beets enough to pay for the fer- 

 tilizer used and leave $4.65 over. With larger amounts of fertili- 

 zer there was less profit, and above 1,000 pounds there was an 

 actual loss. 



Tabulated Summary Showing Effect of Fertilizers upon Money Value 



of Crop. 



Fertilizer used per 



Value of beets per acre. 



acre. Profit 



Lowest. Highest. Average. Increase, from use of 



fertilizer. 



Lbs. 



$42 13 $48 50 $45 82 



500 50 76 64 46 56 98 $11 16 $4 66 



1,000 '. 57 52 63 95 ' 60 33 14 51 1 51 



1,500 56 58 66 31 62 32 16 50 *3 00 



2,000 52 42 66 20 59 31 13 49 *12 51 



* Loss. 



