On the Manurial Effect of Calcium Cyanamide under 

 Different Conditions. 



BY 



S. (UCHIYAMA. 



Various reports on the efficacy of Calcium cyanamide or lime-nitrogen 

 (Kalkstickstoff) testify in favor of this compound, its action reaching^ 

 about that of ammonium sulphate or sodium nitrate ; other reports 

 again contain a less favorable declaration. Evidently the nature of 

 the soil and the nature of the other manuring compounds used along 

 with it, have a decided influence upon the result.^* This difference of 

 opinion can not surprise us, since the reports on the comparative efficacy 

 of sodium nitrate and ammonium sulphate differ also very considerably. 

 Under certain conditions, ammonium sulphate was found equal and even 

 superior to sodium nitrate ; under other conditions again inferior to this. 



The publications on the new manure show among other things, that it 

 can not be used for top-dressing and that it must be applied so ime 

 before sowing, as it would act injuriously before its decomposition by soil- 

 bacteria, liberating its nitrogen as ammonia, is accomplished. 



Since however the manurial effect of lime-nitrogen has not yet been 

 compared with those of ammonium sulphate and sodium nitrate under 

 conditions of different reaction of the total manure, it seemed to me of 

 special interest to carr>^ on some experiments along this line. Since lime- 

 nitrogen can be decomposed by various kinds of bacteria into calcium 

 carbonate and ammonia, CaCK, + 3H.O = CaCOg -I- 2NH3 it must be defined 



i). Compare especially ihe publications of B.Schulze, Feilitzen, Rcessler, Setlhorst, Strohmer, 

 Stutzer and Asa 



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