18 a 



EXPERIMENT STATION. 



[Jan. 



hay yields on these fields were as follows, the figures repre- 

 senting pounds per acre : — 



Field. 



Incomplete 



Fertilizer or 



Check. 



Complete 

 Fertilizer. 



Gain of 



Complete over 



Incomplete. 



Nitrogen Field, 

 Potash Field, . 

 Phosphate Field, 

 I 



3,148 3 

 5,944.0 

 7,060 



5,163.4 

 6,210.3 



7,902.4 



2,015.1 

 266.3 

 842 4 



Comparison of the grass yields of this year with the corn 

 yields of last year is illuminating. Last year the complete 

 fertilizer treatment, varied as it was on the different soils, 

 gave uniform yields of corn. This year the same treatment 

 gave rather diverse yields of hay. All of this happened, how- 

 ever, within a section of land which might well be compassed 

 by the boundaries of a 5-acre lot. Very evidently the peculiar 

 soil conditions in New England make very difficult the drawing 

 of generalizations from fertility field experiments. 



