REPORT OF ANALYSES OF COMMERCIAL 
FERTILIZERS FOR THE SPRING AND 
DATE EORE TOON 
L. L. VAN SLYKE AND W. H. ANDREWS. 
SUMMARY. 
(1) Samples collected. During the year 1901, the Station col- 
lected 968 samples of commercial fertilizers, representing 465 
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 3834 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 found 
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 1.83 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 0 to 6.40 
per ct. and averaged 0.87 per ct. 

*A reprint of Bulletin No. 201. 
