CYANAMID — manufacture:, CHE:MISTRY AND USES 39 



Initial 



After ]4- liour . 

 After 6 hours . 

 After I day 



Quantity of cyanamide 

 Milligrams 



84.0 



79-2 



75.8 



65.9 



After 3 days 52.5 



After 5 days 40.9 



After 7 days 29.8 



After 9 days 22.6 



After II days 18.4 



After 15 days lo.o 



After 18 days cxd.o 



The values obtained are plotted in Fig. 2. It is seen that 

 the removal of cyanamide from the soil solution is a maximum 



Pays after apphcaf /on 



RATE OF REMOV/^L O? CYANAMIDE 

 FROU5OIL SOLUTION, 



Fig. 2. 



in the first few moments of contact. This probably corre- 

 sponds to an initial period of absorption. It is evident, how- 

 4 



