agricultural experiment station. 

 Average. 



No fertilizer 



Dissol red bone black, containing phosphoric acid . . . 



Containing phosphoric acid and 



C Dissolved bone black, I Containii 

 \ Muriate of potush, | potash 



C Disso 

 ^ Muri 

 CSulp! 



Dissolved bone black, 

 iate of potash, 

 )hate of ammonia, 



Containing phosphoric acid, potash 

 and nitrogen. 



Fine ground bone, containing phosphoric acid and nitrogen 



lbs. 

 160 



174 



206 



273 



153 



_£§_ 



bush. 

 53.3 



57.9 

 68.8 



)1.1 



50.9 



Experiment of J. F. Purrington, West Bowdoin. Soil, moist, 

 sandy loam, badlj^ run out. Crop, potatoes. Season unfavorable. 



Plot. 



10 



Fertilizer Applied. 



No fertilizer 



Dissolveu bone black 



Dissolved bona black. 

 Muriate of potash . . . . 



Dissolved bone black 

 ' AJuiiaie of potash . . . , 

 Sulphate of ammonia , 



E'ine ground bone.. . . 



No fertilizer 



Dissolved bone black 



Dissolved bone black. 

 Muriate of potash. .. . 



C Dissolved bone black. 

 < Muriaio of potash ... 

 ( Sulphate of umiuenia. 



Fine ground bone 



a = 



<!-^ 



lbs. 



400 



400; 

 100^ 



400 

 100 ' 

 100. 



40T) 



400 



400 

 100 



400- 

 100 



luo' 



400 



Yield per plot. 



lbs 

 3.3 



20.0 

 27.0 



74.3 



33.0 

 35.0 

 53.0 



73.0 



194.0 

 45.0 



lbs 

 21.5 



24.3 

 32.0 



33.5 



20.0 

 16.3 

 30.0 



26.5 



24.0 

 30.5 



lbs. 

 24.8 



44.3 

 59.0 



107.8 



53.0 

 19.8 

 83.0 



99.5 



21.8 

 75.5 



Yield per acre. 



bu. 

 1.0 



6.C 

 9.0 



24.7 



11.0 



1.1 



17.6 



24.3 



64.6 

 15.0 



bu 



7. J 



8.1 

 10.6 



11.1 



6.6 

 5.4 

 10.0 



8.0 



10. 1 



H 



bu. 



8.1 



14.7 

 19.6 



35.8 



17.6 



6.5 



27.6 



33.1 



72.6 

 25.1 



