30 MAINE AGRICULTURAL EXPERIMENT STATION, I903. 



and steady in price. Tlie trade-valne per pound of these ingre- 

 dients 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 any one wishes to calculate the commercial value he can do so 

 by using the trade values adopted for 1903 by the Experiment 

 Stations of Connecticut, Massachusetts, Rhode Island and New 

 Jersey. These valuations represent the average retail prices at 

 W'hich these ingredients could be purchased during the three 

 months preceeding March i, 1903, 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 FOR I903. 



Cent:* 

 per pound. 



Nitrogen in nitrates 15 



in ammonia salts 17^ 



Organic nitrogen in dry and fine ground fish, meat and 



blood, and in mixed fertilizers. ... 17 



in fine bone and tankage 16^ 



in coarse bone and tankage 12 



Phosphoric acid, water-soluble 4j4 



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 (or chlorides) 5 



as muriate 4/^ 



