Lime Nitrogen (Kalkstiekstoff ) . A new nitro- £° od for 



genons fertilizer is produced by combining the free 



nitrogen of the atmosphere with lime and carbon. 33 



1. Kalkstiekstoff is an exceedingly fine black 

 powder, which character renders it difficult of appli- 

 cation. 



2. If mixed with other fertilizers, such as acid 

 phosphate, the mixture rapidly generates a great heat 

 and gases are given off, some nitrogen being lost as 

 ammonia and oxides of nitrogen. 



3. In storing, it must be very carefully protected 

 from moisture for the above reason. 



4. Being at first rather poisonous to plants, Kalk- 

 stiekstoff is totally unsuited for application to a grow- 

 ing crop, and should always be applied to the land at 

 least two weeks before seeding. 



If these precautions are observed, Kalkstiekstoff 

 may give results equal to Nitrate of Soda and sulphate 

 of ammonia on most crops and soils. 



Some of the slower acting sources of nitrogen are: 



Red Dried Blood, containing 13 to 14 per cent, 

 nitrogen. 



Black Dried Blood, containing 6 to 12 per cent, 

 nitrogen. 



Hoof Meal, containing 12 per cent, nitrogen. 



Tankage, containing 4 to 9 per cent, nitrogen. 



Concentrated Tankage, containing 10 to 12 per 

 cent, nitrogen. 



The above are all produced from slaughter-house 

 refuse. As will be seen, the lower grades of these 

 substances, viz., Black Dried Blood and Tankage 

 (ordinary) are very variable in composition. 



There are numerous other sources of nitrogen, 

 such as the various fish manures, some of which are 

 valuable, if they do not contain too much oil, which 

 is detrimental to the soil, as it hinders decomposition. 



Then there are others, such as leather meal, wool 

 and hair waste, and horn meal. The nitrogen in these 

 is, however, so slowly available that their value as 

 fertilizers is small. 



It is none the less necessary, however, that the 

 farmer should know of these sources of nitrogen, as 



