Il. REPORT OF ANALYSES\OF COMME RG 
FERTILIZERS “OR ODER Pipi @ ee 
L. L. Van SiyKs. 
SUMMARY. 
(1) Samples Collected. During the fall of 1898, the Station 
collected 244 samples of commercial fertilizers, representing 162 
different brands. Of these different brands 111 were complete 
fertilizers; of the others, 23 contained phosphoric acid and 
potash without nitrogen; 5 contained nitrogen and phosphoric 
acid without potash; 12 contained phosphoric acid alone; 5 con- 
tained potash salts only, and 6 contained nitrogen only. 
(2) Nitrogen. The 111 brands of complete fertilizers con- 
tained nitrogen varying in amount from 0.46 to 4.69 per cent and 
averaging 1.67 per cent. The average amount of nitrogen found 
by the Station analysis exceeded the average guaranteed amount 
by 0.16 per cent, the guaranteed average being 1.51 per cent and 
the average found being 1.67 per cent. 
In 84 brands of complete fertilizers, the amount of nitrogen 
found was equal to or above the euaranteed amount, the excess 
varying from 0.01 to 1.29 per cent and averaging 0.30 per cent. 
In 26 brands, the nitrogen was below the guaranteed amount, 
the deficiency varying from 0.02 to 0.77 per cent and averaging 
0.20 per cent. In 24 cases, the deficiency was less than 0.5 per 
cent. : : 
The amount of water-soluble nitrogen varied from 0 to 3.02 per 
cent and averaged 0.54 per cent. 
(3) Available Phosphoric Acid. The 111 brands of complete’ 
fertilizers contained available phosphoric acid varying in amount — 

* Reprint of Bulletin No. 148. 
