Cyanamide, Lime Nitrogen, etc. 



on calcareous soils, or lime must be applied after- 

 wards. It is not a manure of immediate action, like 

 nitrate. It ought to undergo the process of trans- 

 formation just described if used before the winter, 

 but it has the great advantage of not wasting durmg 

 the whiter. It can therefore be applied to wheat 

 before wmter, when it will push it on. It will be 

 better to give nitrate in the early spring to hasten 

 the beginning of growth, but in the course of the 

 summer sulphate is excellent by way of supplying 

 the full complement of nitrate. Sulphate is pre- 

 ferable for malting barley and potatoes. Care 

 must be taken not to mix it with basic slag and 

 even more so with pure lime, because the loss of 

 nitrogen caused by the action of the lime will 

 be considerable. It can be used at the same 

 time as slag or lime, but separately. Nitrogen 

 corresponds to ammonia in the proportion of 

 I to I*2I5. 



Cyanamide, Lime Nitrogen, Calcium Cyana- 

 mide, Nitrolim. 



This is the name given to a valuable manure put 

 on the market a few years ago. The nitrogen it 

 contains is drawTi from the air, and therefore consti- 

 tutes an inexhaustible supply for agricultural pur- 

 poses. It is a heavy, blackish substance, resembling 

 granular gunpowder, but having a characteristic 

 smell like acetylene. It is a nitrogenous product 

 manufactured by the Frank and Caro process, by 

 passing a current of air, deprived of its oxygen by 

 red-hot copper filings, under pressure into a mixture 

 of lime and coal brought to white heat in an electric 



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