REPORT OF INSPECTION WORK. 
REPORT OF ANALYSES OF COMMERCIAL FERTI- 
LIZERS FOR@#HE SPRING AND FALL: OF 1903.* 
W. H. Jorpan, L. L. Van StyKe, W. H. ANDREWS. 
SUMMARY. 
(1) Samples Collected. During the year 1903, the Station 
collected 948 samples of commercial fertilizers, representing 540 
different brands. Of these different brands 377 were complete 
fertilizers; of the others, 70 contained phosphoric acid and pot- 
ash without nitrogen; 29 contained nitrogen and phosphoric acid 
without potash; 12 contained nitrogen only; 39 contained phos- 
phoric acid alone; and 12 contained potash salts only. 
(2) Nitrogen. The 377 brands of complete fertilizers con- 
tained nitrogen varying in amount from 0.14 to 8.382 per ct., and 
averaging 241 per ct. The average amount of nitrogen found 
by the Station analysis exceeded the average guaranteed amount 
by 0.07 per ct., the guaranteed average being 2.04 per ct., and the 
average found being 2.11 per ct. 
In 262 brands of complete fertilizers, the amount of nitrogen 
found was equal to or above the guaranteed amount, the excess 
varying from 0.01 to 1.50 per ct., and averaging 0.22 per ct. 
In 115 brands the nitrogen was below the guaranteed amount, 
the deficiency varying from 0.01 to 2.08 per ct., and averaging 
0.27 per ct. In 96 cases the deficiency was less than 0.5 per ct. 
The amount of water-soluble nitrogen varied from 0 to 8.91 
per ct. and averaged 1.02 per ct. 
(3) Available Phosphoric Acid. The 377 brands of complete 
fertilizers contained available phosphoric acid varying in amount 
from 0.06 to 15.50 per ct., and averaging 8.50 per ct. The aver- 
*Partial reprint of Bulletin_No. 252. 
