96 



HATCH EXPERIMENT STATION. 



[Ju 



Trade Values nf Fertilizing Ingredients in Haw Materials and Chemicals, 

 1.903 and 1904 {Cents per Pot/nd). 



Nitrogen in ammonia salts 



Nitrogen in nitrates, 



Organic nitrogen in dry and fine-ground flsh, meat, ))lood, and in high- 



gi-ade mixed fertilizers. 



Organic nitrogen in line bone and tanliage, 



Organic nitrogen in medium bone and tanl;age, 



Pliosphoric acid soluble in water, 



Phosphoric acid soluble in ammonium citrate, 



Phosphoric acid in fine-ground lieb, bone and tanl<age 



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



Phosphoric acid in coarse fish, bone and tankage 



Phosphoric acid insoluble (in water and ammonium citrate) in mixed 



fertilizers. 



Potash as sulfate (free from chloride), 



Potash as muriate 



17.50 

 lo.OO 

 17.00 



16.50 

 12.00 

 4.. 50 

 4.00 

 4.00 

 4.00 

 3.00 

 •2.00 



5.00 

 4.25 



17.50 

 16-00 

 17.50 



17.00 

 12.50 

 4.50 

 4.00 

 4.00 

 4.00 

 3.00 

 2.00 



5.00 

 4.25 



A comparison of the market costs of the diiferent essential 

 ingredients of plant food for 1904 with the previous year 

 shows the following variation : nitrogen in the form of 

 nitrates is a cent higher per pound ; tlie higher grades of 

 organic nitrogen, including nitrogen classed in high-grade 

 mixed fertilizers, are half a cent higher in cost than for the 

 year 1903 ; the cost of the diflerent forms of phosphoric acid 

 and potassium oxide remains the same as in the previous year. 



As in the past, the above schedule of trade values was 

 adopted b}^ representatives of the Massachusetts, Connecti- 

 cut, Rhode Island, Maine, Vermont and New Jersey experi- 

 ment stations, at a conference held during the month of 

 March, 1904, and is based upon the (quotations in ton lots of 

 the leading standard raw materials furnishing nitrogen, 

 phosphoric acid and potash, and which go to make up the 

 bulk of our commercial fertilizers. These quotations are 

 taken from the fertilizer markets in centres of distribution 

 in New England, New York and Ncav Jersey during the six 

 months preceding March, 1904. 



Table A, on the following page, gives the average analysis 

 of oiScially collected fertilizers for 1904 ; Table B gives a 

 compilation of analyses, showing the maximum, minimum 

 and average percentages of the diiferent essential ingre- 

 dients of plant food found in the s})ecial crop fertilizers, so 

 called, put out by the diflerent manufacturers during the 

 season of 1904. 



