Apr. 5, 1924 
Studies with Cyanamid 
63 
NITRIFICATION OF GUANIDIN NITRATE, NITRO GUANIDIN, BIGUANID NITRATE 
AND UREA 
In continuation of the study of the transformation products of cyanamid a 
series was started using guanidin nitrate, nitro guanidin and biguanid nitrate 
with urea for comparison. The undesirability of using nitrate salts of the organic 
radicals was appreciated but at the time of starting the experiments only these 
salts were available. Adequate controls were arranged where the soil received 
Fig. 11.—Diagram showing the effect of guanylurea sulphate upon the rate of nitrification of urea 
sodium nitrate equivalent to the nitrate nitrogen in the compounds being studied. 
The rate of application for all of the salts was 10 mgm. nitrogen other then nitrate 
per 100 gm. soil. The colorimetric metho’d was used for nitrate determinations. 
The data which are the averages of duplicate determinations are given in 
Table XIV. 
