60 



CONCORD. 



SOIL-TEST WITH FERTILIZERS FOR POTATOES, 



by Frank Wheeler. 



Average of the nothing plots : large, 63.9 bushels; small, 12.3 bushels. 



The acre used in this experiment is the same as was used tor a 

 similar experiment with corn in 1890, when the average of tho 

 nothing plots was at the rate of 65.8 bushels of shelled corn per acre. 

 The field is nearly level, the soil a good sandy loam, with loamy sub- 

 soil changing to sand at two and one-half to three feet, except in one 

 corner where it is rather heavier. It is naturally even in quality 

 throughout, as indicated by the yield of the nothing plots except at 

 the corner above alluded to, which apparently affects unfavorably 

 one end of plots 11, 12, 13, 14 and 15. Plot 15, however, gives 

 practically as good a crop as any of the nothings this year. 



In this experiment' double the usual amount of fertilizer was 

 applied, viz. ; at the following rates per acre : nitrate of soda, 320 

 pounds ; dissolved bone-black, 640 pounds ; muriate of potnsh, 320 

 pounds ; lime, 320 pounds ; and plaster, 320 pounds. This depar- 



