New York Agricultural Experiment Station. 141 



1896. 

 Cts. per lb. 



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

 ides) in ashes, etc 5 



Potash in muriate 4% 



3. Valuation of Fertilizing Ingredients in Fine Ground 



Foods. 



Organic nitrogen , 12 



Phosphoric acid 4% 



Potash 5 



The trade-values in the foregoing schedule represent the aver- 

 age prices at which, in the six months preceding March, the re- 

 spective ingredients, in the form of unmixed raw materials, could 

 be bought at retail for cash in our large markets, Boston, New 

 York and Philadelphia. These prices also correspond to the 

 average wiiolesale prices for the six months preceding March, 

 plus about 20 per cent in case of goods for which there are whole- 

 sale quotations. 



4. Commercial Valuation of Fertilizers. 

 The commercial valuation of a fertilizer consists in estimating 

 the approximate value or monej'-cost of the essential fertilizing 

 constituents (nitrogen, phosphoric acid and potash) in one ton of 

 fertilizer. This does not take into consideration cost of mixing, 

 of transportation, storage, commissions to agents and dealers, 

 etc., but only the one item of retail cash cost, in the market, of 

 unmixed raw materials. 



5. Simple Rule for Calculating the Approximate Commercial 

 Valuation of a Fertilizer from the RssiiLTS of Analyses. 

 Multiply the percentage of nitrogen by three and to the product add 

 the percentage of available phosphoric acid and the percentage of 

 potash. The total sum will express in dollars and cents the ap- 

 proximate commercial valuation of one ton (2,000 pounds) of the 

 fertilizer. 



Examples: — A fertilizer contains 3.44 per cent of nitrogen, 

 6.15 per cent of available phosphoric acid and 9.89 per cent of 

 potash. 



3.44 (percentage nitrogen) multiplied by three, equals 10.32 



6.15 (percentage available phosphoric acid), equals 6.15 



9.89 (percentage iwtash), equals 9.89 



Total $26.36 



