Field Experiments with Fertilizers. 



325 



* For the meaning of these abbreviations and the rate at which the fertilizers were applied 

 see page 317. 



A study of tlie above table shows that stable manure (S) gave the 

 best results and that a complete fertilizer (NPK) gave the next best. 

 Stable manure having increased the yield of large potatoes 66.8 bu. 



61. — Potatoes grown and harvested by Mr. Bonnell. 



over the yield on the blank plat and decreased the yield of small 

 potatoes from 6.3 bu. to 5..5 bu. The complete fertilizer (NPK) 

 increased the yield over the blank plat 47.8 bu. of large potatoes 

 and decreased the yield of small potatoes from 6.3 bu. to 5.7 bu. 

 Of the plant-foods used alone potash gave better results than 



