1907.] PUBLIC DOCUMENT — No. 33. 



67 



Trade Values of Fertilizing Ingredients in Raiv Materials and Chemicals, 

 1905 and 1006 {Cents jter Found). 



1905. 



Nitrogen in ammonia salts 



Xitrogcu in nitrates 



Organic nitrogen in dry and fine ground flsh, meat, Wood, and in 



high-grade mixed fertilizers, 



Organic nitrogen in flue bone and tankage. 

 Organic nitrogen in coarse bone and tankage, . 



Phosphoric acid soluble in wsiter 



Phosphoric acid soluble in ammonium citrate, . 



Phosphoric acid in fine-ground flsh, bone and tankage, 



Phosphoric acid in cotton-seed meal, castor pomace and wood ashes, 



Phosphoric acid in coarse flsh, bone and tankage, 



Phosphoric acid insoluble (in water and neutral citrate 



In mixed fertilizers, 



Potash as sulphate (free from chlorides), . 

 Potash as muriate (chloride), .... 

 Potash as carbonate, 



of ammonia) 



17.50 

 17.00 



18.50 

 18.00 

 13.00 

 4.50 

 4. CO 

 4.00 

 4.00 

 3.00 



2.00 

 5.00 

 4.25 

 8.00 



17.50 

 16.50 



18.50 

 18.00 

 13.00 

 4.50 

 4.00 

 4.00 

 4.00 

 3.00 



2.00 

 5.00 

 4.25 

 8.00 



A comparison of the market cost of tlie various forms in 

 which the three essential elements of jDlant food are found 

 shows the nitrogen in the form of nitrates to be a half-cent 

 lower in cost than for the previous year ; the cost of the other 

 forms of nitrogen, as well as the various sources of potash 

 and phosi^horic acid, remains the same as for 1905. 



The above schedule of trade values was adopted by repre- 

 sentatives of the Massachusetts, Connecticut, Rhode Island, 

 Maine, Vermont and New Jersey experiment stations, at a 

 conference held during the month of February, 1906, and 

 is based upon the condition of the fertilizer market in centers 

 of distribution in N^ew England, N^ew York and N^ew Jersey 

 during the six months preceding March, 1906, and refers 

 to the current market prices, in ton lots, of the leading stand- 

 ard raw materials which furnish nitrogen, phosphoric acid 

 and potash, and which enter largely into the manufacture of 

 our commercial fertilizers. 



Table A, on a following page, gives the average composi^ 

 tion of licensed commercial fertilizers for 1906. 



Table B gives a compilation of analyses of the so-called 

 special crop fertilizers, and shows the wide variation in the 



