New York Agricultural Experiment Station. 441 

 trade-values op plant-food elements in raw materials and 



CHEanCALS. 



The trade-values in the following schedule have been agreed 

 upon by the Experiment Stations of Massachusetts, Rhode Island, 

 Connecticut, New York, New Jersey and Vermont, as a result of 

 study of the prices actually prevailing in the large markets of 

 these states. 



These trade-values represent, as nearly as can be estimated, 

 the average prices at which, during the six months preceding 

 March, the respective ingredients, in the form of unmixed raw 

 materials, could be bought at retail for cash in our large markets. 

 These prices also correspond (except in case of available phos- 

 phoric acid) to the average wholesale prices for the six months 

 preceding March plus about 20 per ct. in case of goods for which 

 there are wholesale quotations. 



Tkade-Values of Plant-Food Elements in Raw Materials and 



Chemicals. 



1900. 



Cts per 



pound. 



Nitrogen in ammonia salts 17 



in nitrates 13i^ 



Organic nitrogen in dry and fine-ground fisli, meat and blood, and 



mixed fertilizers 15^ 



" in fine-ground bone and tanliage loi/^ 



" in coarse bone and tankage 10% 



Phosphoric acid, water-soluble 4i/^ 



" citrate-soluble 4 



" in fine-ground fish, bone and tankage 4 



" in coarse fish, bone and tankage 3 



** in mixed fertilizers, insoluble in ammonium ci- 

 trate and water 2 



Potash as high-grade sulphate, in forms free from muriates (chlo- 

 rides), in ashes, etc 5 



Potash in muriate 4i/i 



COMPARISON OF SELLING PRICE AND COMMERCIAL. VALUATION. 



Giving to the different constituents the values assigned in the 

 schedule for mixed fertilizers, 15^ cents a pound for nitrogen, 4^ 

 cents a pound for water-soluble phosphoric acid, 4 cents a pound 

 for citrate-soluble phosphoric acid, 2 cents a pound for insoluble 



