90 Report of the Chemist of the 



composition of fertilizers collected. 



The following tabulated statements show the average composi- 

 tion of the fertilizers collected during the spring, together with a 

 comparison of the guaranteed composition and that found by 

 analysis. 



Aveeage Composition of Complete Fertilizers Collected. 



Per cent guaranteed. m Per cmt found. p, c * 



t , m . , v° U> 



*- ce 4^ > a) 



Low- High- Aver- | Low- High- Aver- <Dg,§"a 



est. est. age. • est. est. age. > o * ea 



Nitrogen 0.40 8.78 2.06 0.12 8.21 2.20 0.14 



Available phosphoric 



acid 3.00 14.00 7.65 3.69 14.28 8.65 1.00 



Insoluble phosphoric 

 acid • 0.00 10.75 1.90 



Potash 0.50 15.00 4.67 0.22 15.22 4.91 0.24 



Water-soluble nitro- 

 gen 0.00 5.03 0.94 



Water-soluble phos- 

 phoric acid 0.10 11.11 5.08 



The following statements, applying to the complete fertilizers, 

 are of interest in connection with this table: 



(1) The nitrogen was above the guarantee in 70 per cent of 

 the samples and in 2 per cent it was below the guarantee by one- 

 half of one per cent or more. 



(2) The available phosphoric acid exceeded the guarantee in 

 81 per cent of the samples, and in 4.5 per cent it was one and one- 

 half per cent or more below the guarantee. 



(3) The potash was above the guarantee in 74 per cent of the 

 samples, and in 3.3 per cent it was one-half of one per cent or more 

 below the guarantee. 



