808 Report on Inspection Wokk of the 



The sum of these 4 products will be the commercial valuation 

 per ton on the basis taken. 



Illustration. — The table of analyses shows a certain fertilizer to 

 have the following composition: Nitrogen 2.52 per ct.; available 

 phosphoric acid 6.31 per ct. ; insoluble phosphoric acid .89 per ct.; 

 potash 6.64 per ct. According to this method of valuation, the 

 computation would be as follows: 



Nitrogen 2.52x3.8 $9.83 



Available phosphoric acid 6.31 x 0.9 5.70 



Insoluble phosphoric acid 0.89 x 0.4 0.36 



Potash 6 . 64 x 1 .0 6 . 64 



$22.53 



This rule assumes all the nitrogen to be organic and all the pot- 

 ash to be in the form of sulphate. If a considerable portion of 

 nitrogen exists in the fertilizer as nitrate of soda or as sulphate of 

 ammonia, and potash is present as muriate, the results are some- 

 what less. 



Farmers should be warned against judging fertilizers by their 

 valuations. A fertilizer, the cost of which comes chiefly from the 

 phosphoric acid present, would value much lower commercially 

 than a fertilizer with a high percentage of nitrogen, and yet the 

 former might be the more profitable one for a given farmer to 

 purchase. 



