CYANAMID — manufacture:^ CHEMISTRY AND USDS 6l 



the practical consequences of its brief existence are probably- 

 very slight. Hutchinson and Miller have shown that ammo- 

 nium salts, also, are directly assimilated by plants,^ but just 

 how effective such processes are it is difficult to estimate. 

 Practically there can be no doubt but that most of the 

 ammonium salts are converted to nitrates prior to their absorp- 

 tion by the plant. 



1 Jour. Agr. Sci., Vol. IV, Part 3, p. 282. 



