Bui. 1180. U. S. Dept. of Agriculture. 
Plate XII, 
Fig. I. — Growth of Cotton with Ammonium Phosphate and Ammonium 
Sulphate. Field 3, Season of I92I. 
At left, ammonium phosphate, 1,00) pounds 4-13-4 fertilizer per acre; yield 890 pounds of seed 
cotton. Center (1 row), no fertilizer; yield 285 pounds of seed cotton. At right, ammonium 
sulphate, 1,000 pounds 4-13-4 fertilizer per acre; yield 958 pounds of seed cotton. 
Fig. 2. — Early Growth of Cotton with Ammonium Sulphate and Am- 
moniated Superphosphate. Field 3, Season of 1921. 
At left, ammonium sulphate, 1,000 pounds 2-5-4 fertilizer per acre; yield 735 pounds of seed cotton. 
Center (1 row), no fertilizer; yield 188 pounds of seed cotton per acre. At right, ammoniated 
sunerphosphate, 1,000 pounds 2-5-4 fertilizer per acre; yield 553 pounds of seed cotton. (Soil 
somewhat poorer on this plat.) 
