42 MAINE AGRICULTURAL EXPERIMENT STATION. I905. 



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 

 manufacture, 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 1904 by the 

 Experiment Stations of Connecticut, ^Massachusetts, Rhode 

 Island and New Jersey. These valuations represent the average 

 retail prices at which these ingredients could be purchased dur- 

 ing the three months preceding March i, 1904, in ton lots at 

 tide water in the states named. On account of the greater dis- 

 tance from the large markets the prices for Maine at tide water 

 would probably be somewhat higher than those quoted. 



TRADE VALUES OF FERTILIZING INGREDIENTS FOR I904. 



Cents 

 per pound. 



Nitrogen in nitrates 16 



in ammonia salts 17^ 



Organic nitrogen in dry and fine ground fish, meat and 



blood, and in mixed fertilizers. . . 173^ 



in fine bone and tankage 17 



in coarse bone and tankage 12^ 



Phosphoric acid, water-soluble 4^ 



citrate-soluble 4 



of fine ground bone and tankage, ... 4 



of coarse bone and tankage 3 



of cotton seed meal, castor pomace, 



and ashes 4 



of mixed fertilizers, if insoluble in 



ammonium citrate 2 



Potash as high grade sulphate and in forms free from 



muriate Cor chlorides) 5 



as muriate 43^ 



