52 a 



EXPERIMENT STATION. 



[Jan. 



the stover on this plot was at the rate of 5,240 pounds per acre. 

 The yield on the plot receiving the combination rich in potash 

 was 30.4 bushels per acre of crib-dried corn, and 4,660 pounds 

 per acre of stover. 



North Soil Test. 

 This experiment began in 1890, and has for its object a study 

 of the effect of the continued use of fertilizers containing single 

 plant-food elements and different combinations of plant-food 

 elements for different crops; also the effect of lime added to 

 each fertilizer under comparison. The west half of each plot 

 received an application of hydrated lime at the rate of 1 ton 

 per acre in 1899 and again in 1904. The application in 1907 

 was at the rate of one-half ton per acre, and in 1916 ground 

 limestone at the rate of 2 tons per acre was applied. The crop 

 this year was field corn. The following table gives the fertilizer 

 schedule and the yields per acre for this year: — 



