Nitrogenous Fertilizers 39 



considered better than many other organic nitrogenous 

 materials, is less concentrated and less uniform. It is un- 

 fortunate from the farmer's point of view that the supply 

 of these materials is decreasing so rapidly. 



DRIED MEAT OR MEAL, AZOTIN, AMMONITE OR ANIMAL 



MATTER 



Dried meat or meal, azotin, ammonite or animal matter, 

 are terms applied to practically the same product produced 

 at rendering establishments, where the different portions of 

 dead animals are utilized. These are subjected to treat- 

 ment, usually dried and extracted with steam, for the 

 purpose of securing the fat, though formerly, and even 

 now, a large portion of this product is obtained from the 

 beef extract factories. When relatively pure it contains 

 13 to 14 per cent of nitrogen and compares favorably with 

 blood. When the use of fertilizer was less and the supply 

 relatively greater this was an important product. To- 

 day it is seldom heard of and the market does not recognize 

 it as such. 



This product, very limited in supply, is reasonably uni- 

 form in composition, containing as high as 12 per cent of 

 nitrogen, and ranks among the high-grade materials. 

 It is considered superior to leather, wool or hair. 



DRIED AND GROUND FISH, OR FISH GUANO 



Ground fish is obtained from two sources: first, from 

 the offal, largely bones and skins, of fish packing or canning 

 houses ; and second, from the fish pomace resulting from 

 extraction of the oil from the Menhaden. The latter 

 product is richer in nitrogen and is more uniform in char- 

 acter than the wastes from the packing houses. Dried 



