148 



MAINE STATE COLLEGE 



Experiment of H. C. Towsaud, Fort Fatefield. 



Crop, potatoes, planted May 23 in checks 32 inches each way, 

 making 288 hills per plot. "Whole seed was used, just below 

 market size. Rust struck the tops August 12 'which greatly 

 reduced the yield. Potatoes dug and weighed Sept. 20-29. 

 Below are given the results : 



Fertilizers applied. 



o g 



lbs. 



Dissolved bone-black , 500 



Nitrate of soda 15u 



Muriate of potash 100 



Dissolved bone-black ■ 500 



Muriate of potash 100 



Dissolved bone-black 500 



Nitrate of soda 150 



Dissolved bone-black - - r > 1 1 



Muriate of potash 100 



N itrate of soda 150 



Nitrate of soda 150 



Muriate of potash 1.0 



No manure 



i if) i 

 50/ 





p] 





p ( 





c 





c 













- a: 





a ~ r - 



c 



o = 



c 



=-i = 



£h 



— X 



Ch 



- 2 



o-l 



C 



6* C 



o 



ESC - 



o 





6 



*8 ■" 



1 



57S 



la 



564 



2 



511 



2a 



597 



3 



516 



3a 



559 



4 



455 



Aa 



503 



5 



40S 



oa 



440 



6 



-'18 



6a 



415 



7 



370 



7a 



421 



8 



335 



8a 



374 





bush. 

 190.3 



184.7 



179.3 



159.7 



141.3 



13S.8 

 131 8 

 118.2 



The table below shows the increase of crop on manured plots 

 over unmanured plots calculated per acre, and the cost of fer- 

 tilizers used, on the basis of dissolved bone black at S24.00 per 

 ton. muriate of potash at 2 cents per pound and nitrate of soda 



at 2 cents per pound, also cost of increase per bushel. 



Plots. 



Increase iu crop 



per acre due to 



fertilizers. 



Cost of fertilizer 

 per acre. 



Cost of increase 

 per bushel. 



1 and la . 



2 and 2a ■ 



3 and ?ri . 



4 and 4a. 



5 and oa . 



6 and 6a . 



7 and la , 



8 and Sa ■ 



72.1 bushels. 



66.5 



61.3 



41.5 



23-1 " 



20-6 



13.6 



811.00 

 88.00 

 89.00 

 86.00 

 15.00 

 83.00 

 §2.00 



15-2 cents. 



12.0 



14.3 



14.5 



21.2 



14.6 



14.7 



In this experiment all of the fertilizers caused an increase in 

 the crop but the combination of dissolved bone black and muriate 

 of potash produced the increase at the least cost per bushel. 



