90 MAINE) AGRICULTURAL, EXPERIMENT STATION. I908. 



stances, nitrogen, phosphoric acid and potash, which are com- 

 paratively costly and steady in price. The trade-value per 

 pound of these ingredients is reckoned from the current market 

 prices of the standard articles which furnish them to commerce. 

 The consumer, in estimating the reasonable price to pay for 

 high-grade fertilizers, 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 1908 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 1, 1908, in ton lots at tide water in the states 

 named. 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 OF FERTILIZING INGREDIENTS E0R 1908. 



Cents 

 per pound 



Nitrogen in nitrates 18^ 



in ammonia salts \y\ 



Organic nitrogen in dry and fine ground fish, meat and 



blood, and in mixed fertilizers .... 20^ 



in fine bone and tankage 2o\ 



in coarse bone and tankage 15 



Phosphoric acid, water-soluble 5 



citrate-soluble 4^ 



in fine ground bone and tankage ... 4 



in coarse bone and tankage 3 



in cotton seed meal, castor pomace 



and ashes < 4 



in mixed fertilizers, if insoluble in 



ammonium citrate 2 



