Bui. 
180. U. S. Dspt. of Agriculture. 
Plate IV. 
Fig. 
— Growth of Cotton with Sodium Nitrate and Cyanamid 
Phosphate Applied Separately i. Field I, Season of 1920. 
Acid 
At left, sodium nitrate, 1,000 pounds 8-8-4 fertilizer per acre; yield 2.2C8 pounds of seed cotton. 
At right, cyanamid, 1,030 pounds 8-8-4 fertilizer per acre; yield 2,096 pounds of seed cotton 
Fig. 2. — Field of Cotton, Showing Injury Produced by a Heavy Appli- 
cation of Cyanamid during a Very Dry Period. Field 2, Season of 
1921. 
At left, cyanamid (with basic slag), 1,000 pounds 8-8-4 fertilizer per acre; more than half of the 
plants died: yield ">.56 pounds of seed cotton. At right, no nitrogen, 1,000 pounds O-S-4 fertilizer 
per acre; stand good; yield 424 pounds of seed cotton. 
