cyanamide or 1 to 1-1/2 pounds of calcium cyanamide per square yard, or 

 1 pound of methyl bromide per 100 square feet of plant bed area. Applica- 

 tions of commercial urea- cyanamide or cyanamide alone should be made in 

 October in the mid-Atlantic States and thoroughly mixed in the upper 3 

 inches of soil by disking and raking. Methyl bromide is a volatile soil 

 sterilant, and the plant bed must be covered with a gastight cover for the 

 chemical to be effective. Methyl bromide may be used in the spring without 

 residual toxicity to tobacco plants. 



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