118 



POTATOES AND POTATO CULTURE 



PLOT. 



Barnyard Manure — 15 Cords per Acre. 



Additional Commer- 

 cial Fertilizer. 



(Potato Mixture.) 



Plowed In. 



Large 

 bush. 



Small 

 bush. 



Total 

 bush. 



Harrowed In. 



Large Small Total 

 bush, i bush. bush. 



1 

 2 

 3 



4 

 5 

 6 

 7 

 8 

 9 



None 



750 pounds. 

 1,500 



750 

 None 



750 pounds. 

 2,000 



750 •' 

 None 



308 

 387 

 418 

 420 

 291 

 368 

 263 

 372 

 287 



Total 



Approximate average. 



3,114 

 346 



Fig. 5.— Red American Wonder, Potato No. 99. 



Conclusions. — In drawing conclusions from this experiment 

 it is evident that in every instance excepting one, namely, plot 

 4, the results from plowing under the barnyard manure give a 

 larger yield. Averaging the plots as a whole, the plots plowed 

 under outyielded the others at the rate of 15 bushels per acre 

 of marketable potatoes, or 12 bushels of total, large and small. 



