8 MAINE AGRICULTURAL EXPERIMENT STATION. 191I. 



sumer, in estimating the reasonable price to pay for high-grade 

 fertiHzers, should add to the trade-value of the above-named 

 ingredients a suitable margin for the expenses of manufacturer, 

 etc., and for the convenience or other advantage incidental to 

 their use. 



For many years this Station has not printed an estimate of 

 the commercial value of the different brands licensed in the 

 State. If anyone wishes to calculate the commercial value he 

 can do so by using the trade values adopted for 1910 by the 

 Experiment Stations of Connecticut, Maine, Massachusetts, 

 New Hampshire, New Jersey, Rhode Island and Vermont. 

 These valuations represent the average retail prices at which 

 these ingredients could be purchased during the three months 

 preceding March i, 1910, in ton lots at tide water in southern 

 New England. On account of the greater distance from the 

 large markets the prices for Maine at tide water would probably 

 be somewhat higher than those quoted. 



TRADE VALUES OE FERTILIZING INGREDIENTS FOR 191O. 



Cents 

 per pound 



Nitrogen in nitrates 16 



in ammonia salts 16 



Organic nitrogen in dry and fine ground fish, meat and 



blood, and in mixed fertilizers .... 20 



in fine bone and tankage 20 



in coarse bone and tankage *. . . . 15 



Phosphoric acid, water-soluble 4I/2 



citrate-soluble ' . . . 4 



in fine ground bone and tankage. . . , 4 



in coarse bone and tankage 3^ 



in cotton seed meal, castor pomace 



and ashes 3^/2 



in mixed fertilizers, if insoluble in 



ammonium citrate 2 



Potash as high grade sulphate and in forms free from 



muriate or chlorides 5 



as muriate 4^ 



RULES FOR CALCULATING VALUATION OF FERTILIZERS. 



The commercial valuation will be accurate enough as a means 

 of comparison if the following rule is adopted : 



