1901.] 



PUBLIC DOCUMENT— No. 33. 



57 



From a careful scrutiny of the results of analyses published 

 in the three bulletins during the year it becomes an easy 

 matter for the farmer to intelligently select his fertilizers for 

 the next year's consumption, always bearing in mind tluit 

 the fertilizer costing the least i)er ton is not always the most 

 economical fertilizer to buy, but rather the one that will fur- 

 nish the greatest amount of nitrogen, potassium oxide and 

 phosphoric acid, in a suitable and available form, for the 

 same money. 



Trade Values of Fertilizing Ingredients in Rato Materials and 

 Chemicals, 1899 and 1900 {Cents per Pound). 



1900. 



Nitrogeu in timmonia salts, 



Nitrogen in uitrateK, 



Organic nitrogen in dry and fine-ground fish, meat, blood and in high-grade 



fertilizers. 



Organic nitrogen in fine bone and tankage 



Organic nitrogen in medium l)one and tankage 



Phosphoric acid soluble in water, 



Phosjihoric acid soluble in ammonium citrate, 



Phosphoric acid in fine-ground fish, bone and tankage, .... 

 Phosphoric acid in cotton-seed meal, castor poiuace and wood ashes, 



Phosphoric acid in coarse fish, bone and tankage, 



Phosphoric acid insoluble (in water and in ammonium citrate) in mixed 



fertilizers. 

 Potash as sulfate (free from chlorides), . ....... 



Potash as muriate, 



15.0 

 12.5 

 14.0 



14.0 

 10.0 

 4.5 



4.0 

 4.0 

 4.0 

 2.0 

 2.0 



5.0 

 4.25 



17.0 

 13.5 

 15.5 



15.5 

 11.0 

 4.5 

 4.0 

 4.0 

 4.0 

 3.0 

 2.0 



5.0 

 4.25 



The cost of some of the leading forms of nitrogen shows a 

 marked increase, as compared with the preceding year, 1899. 



The above trade values are based on the market cost, dur- 

 ing the six months preceding March, 1900, of standard raw 

 materials which are largely used in the manufacture of com- 

 pound fertilizers found in our markets. The following is a 

 list of such materials : — 



Sulfate of ammonia. 

 Azotine. 



Cotton-seed meal. 

 Linseed meal. 

 Bone and tankage. 

 Nitrate of soda. 

 Dried blood. 

 Castor pomace. 

 Dry ground fish. 

 Dry ground meat. 



Dissolved bones. 



Aeid phosphate. 



Refuse bone-black. 



Ground phosphate rock. 



High-grade sulfate of potash. 



Sulfate of potasli and magnesia. 



Muriate of potash. 



Kainit. 



Sylvinite. 



Crude saltpetre. 



