REPORT OF ANALYSES OF COMMERCIAL 



FERTILIZERS FOR THE SPRING AND 



FALL OF 1901 * 



L. L. VAN SiiYKE AXD W. H. ANDREWS. 



SUMMARY. 



(1) Samples collected. During the year 1901, the Station col- 

 lected 963 samples of commercial fertilizers, representing 4G5 

 different brands. Of these different brands 334 were complete 

 fertilizers; of the others, 49 contained phosphoric acid and pot- 

 ash without nitrogen; 21 contained nitrogen and phosphoric 

 acid without potash; 15 contained nitrogen only; 35 contained 

 phosphoric acid alone; and 11 contained potash salts only. 



(2) Nitrogen. The 334 brands of complete fertilizers con- 

 tained nitrogen varying in amount from 0.36 to 8.10 per ct., and 

 averaging 2.01 per ct. The average amount of nitrogen fouud 

 by the Station analysis exceeded the average guaranteed amount 

 by 0.12 per ct., the guaranteed average being 1.89 per ct., and 

 the average found being 2.01 per ct. 



In 250 brands of complete fertilizers, the amount of nitrogen 

 found was equal to or above the guaranteed amount, the excess 

 varying from 0.01 to 1.33 per ct., and averaging 0.22 per ct. 



In 84 brands the nitrogen was below the guaranteed amount, 

 the deficiency varying from 0.01 to 1.09 per ct., and averaging 

 0.18 per ct. In 78 cases, the deficiency was less than 0.5 per ct. 



The amount of water-soluble nitrogen varied from to 6.40 

 per ct. and averaged 0.87 per ct. 



*A reprint af Bulletin No. 201. 



