COMMKRCIAL FERTILIZERS II7 



Per cent. 



Nitrogen as nitrate i .00 



Total phosphoric acid 1 2.00 



Available phosphoric acid 10.00 



All the other statements omitted in the simplified chemical 

 guarantee are correct btit unnecessary and misleading. The per- 

 centage given under "equal to nitrate of soda," and "equivalent 

 to bone phosphate" are simply restatements."" 



Guaranteed Chemical Analysis, No. 2. 



Per cent. 



Total phosphoric acid 1 1-14 



Equivalent to total bone phosphate 24-30 



Available phosphoric acid 10-12 



Equivalent to available bone phosphate 22-26 



Soluble phosphoric acid 8-10 



Equivalent to soluble bone phosphate 17.5-22 



Insoluble phosphoric acid 1-2 



Equivalent to insoluble bone phosphate 2-4. 25 



Potash 4-5 



Equivalent to sulphate of potash 7-4-9 



Total nitrogen 2-3 



Equivalent to total ammonia 2.4-3.6 



This is not an exaggerated guarantee but one that is often 

 found in the fertilizer trade. 

 Simplified the above reads : 



Per cent. 



Total phosphoric acid 11 .00 



Available phosphoric acid 10.00 



Soluble phosphoric acid 8.00 



Insoluble phosphoric acid i.oo 



Potash 4.00 



Nitrogen 2 .00 



Or we may further simplify this to read ; 



I'er cent. 



Available phosphoric acid 10.00 



Potash 4. 00 



Nitrogen 2.00 



It will be noticed that the simplified statements contain the 

 minimum percentages ; for example, available phosphoric acid is 

 guaranteed as 10 to 12 per cent, and in the simplified statement 

 it is given as being 10 per cent. This latter figure 10 per cent. 



