11 



Upon this average the profit or loss from the use of nitrogen is 

 calculated, no allowance being made for unexhausted residue. 



Similar comparisons and calculations are made for phosphoric acid 

 and potash. The results for all three ingredients are shown in tabu- 

 lar form under each experiment. 



For convenience of comparison with each other and with the results 

 just mentioned the net results of the use of "complete fertilizer", 

 barn^'iird manure, plaster and lime are shown in another table, 

 although this plan involves the repetition of some of the figures given 

 in the general tabular view of the entire experiment. Below this 

 table will be found a calculation as to financial result of the use of 

 each. In this calculation no allowance is made for unexhausted res- 

 idue of either manure or fertilizer. This omission undoubtedly 

 makes the showing for manure more unfavorable than it should be. 

 If we make the usual allowance of one-half, the manure will come 

 much nearer to paying for itself and for the labor of application 

 which, it should be remembered^ has not been charged. The expres- 

 sion " complete fertilizer" is used in the ordinary sense, to designate 

 a mixture which supplies nitrogen, phosphoric acid and potash. 



The Pittsfield experiment wafi ruined by crows which pulled the 

 young plants, and the results in West Bridgewater aud Lexington 

 were affected by so many accidental conditions that it is not deemed 

 best to publish them. An account of each of the others follows : 



