G. A. C'owiR 



135 



300 



200 



TOO 



Control Aramoiiium Cyananiido C'y. 3 Cy. 1 Dicyaiio- 



sulphate l^icy. 1 Dicy- 3 diamidc 



Fig. 2 a. Showing relative weights of dry matter in mustard crop. 

 (Control = 100.) 



7 21 42 Q4 days 



Fig. 3. Showing depressing effect of dicyanodiamide on nitrification of ammonium sulphate. 



