522 



VARIOUS FERTILITY FACTORS 



's FERTILIZERS Contimted 



Brands and Analyses 



" Maximum guaranteed analyses are misleading our guaranteed analyses 

 in table below are minimum. 



1 Insoluble phosphoric acid derived from animal bone. 



"Nitrogen (ammonia) in all the above brands derived from Blood and Bone. 



"Purchasers of fertilizers should profit by the fact that the higher the guaran- 

 teed fertilizer analysis, the less the cost of the plant food obtained, allowing for 

 equal distances of shipment. It pays, therefore, to buy fertilizers on the basis 

 of analyses and not simply by the price per ton for some certain brand. By 



making a careful comparison of our analyses when buying fertilizers, 's 



will lead. 



"For the convenience of our customers in making comparisons of values of 

 different fertilizers, we suggest the following as being approximate values : 



"(i) Pure Bone Fertilizers. If any one of these grades is desired, the values 

 for the essential compound ingredients may be limited as follows : 



Ammonia at 15 c. per Ib $3.00 per unit 



Phosphoric acid at 5 c. per Jb i.oo per unit 



Potash, actual, at 6 c. per Ib 1.20 per unit 



Ammonia at 15 c. per Ib 3.00 per unit 



"(2) Acidulated Fertilizers, which are more complex in their nature and 

 manufacture, may be judged comparatively by the following: 



