home; mixed fertilizers. 



135 



stood that this class of goods is always sold under a guaranteed 

 percentage composition, and the percentages here given are only 

 approximate and for guidance in inquiry. 



AVERAGE COMPOSITION OF CHIEF COMMERCIAL FERTILIZER 



MATERIALS. 



Nitrogen. 



Phosphoric 



Acid. 



i 



1 

 





J, ® 





'5° 





cS O 









<D 



> £ 





O 11 



0, 



<a 





Ha 



S3 O 

 OS O 



Nitrate of soda 



Nitrate of potash 



Sulphate of ammonia 



Dried blood, high grade 



Dried blood, low grade 



Concentrated tankage 



Bone tankage 



Portland Rendering Co's tankage in 1904.. 



Portland Rendering Co's tankage in 1904, 

 screened 



Dried fish scrap 



Cotton-seed meal 



Acid phosphate 



Raw ground bone (bone meal) . . 



Steamed bone 



Muriate of potash 



Sulphate of potash (high grade) 



Kainit 



Hard wood ashes (unleached)... 

 Hard wood ashes (leached) 



16 

 14 

 20 

 13 

 10 

 12 

 5.5 

 4.9 



5.5 



8 



7 



4.2 



7.3 



4 



1 



12 



16.3 



16.0 



7 



1.5 



14 



44 



Fertilizing materials should be dry and fine. If moist there is 

 danger of their lumping. Not only the evenness of the mixture, 

 but the availability of forms of plant food is directly dependent 

 upon the fineness of the goods. Ground bone is only very slowly 

 available unless it is finely ground. In ordering chemicals it 

 should always be demanded that they be finely ground and in 

 good mechanical condition, for the mixed goods will not be satis- 

 factory for machine use unless the ingredients are in good shape. 



