New York Agricultural Experiment Station. 



399 



COST OF NITROGEN IN DRIED BLOOD. 



In the samples of dried blood analyzed by us in 1902, the per- 

 centage of nitrogen varied from 8.72 to 11.88, averaging 10.38. 

 The selling price varied from $35 to $40, averaging $38.33. The 

 commercial valuation varied from $28.78 to $39.20, averaging 

 $34.26. The cost of one pound of nitrogen varied from 14.8 to 

 22.9 cents, averaging 18.5 cents. Tliis makes the price of the 

 nitrogen of dried blood higher than that in nitrate of soda and 

 bone-meal but somewhat cheaper than nitrogen in complete 

 fertilizers. 



COST OF POTASH IN MURIATE OF POTASH. 



The percentage of potash was found to vary from 49.06 to 

 52.04, averaging 50.46. The selling price varied from $46 to 

 $48 and averaged $46.75. The commercial valuation varied from 

 $41.70 to $44.23, averaging $42.89. The cost of one pound of 

 potash varied from 4.4 to 4.9 cents and averaged 4.6 cents. In 

 average price, potash in the form of muriate was cheaper than in 

 the highest grade mixed goods. 



TABULATED GENERAL SUMMARY. 



In the table following, we give a general summary of the data 

 that have been presented, showing the cost of one pound of 

 plant-food in different forms to consumers. 



Cost of One Pound of Plant Food to Consumers. 



Nitrogen in 



Low-grade complete fertilizers 



Medium-grade complete fertilizers ., 



Medium high-grade complete fertilizers.. 



High-grade complete fertilizers 



Dried blood . ...... 



Bone-meal ...... ... .. ...... .. 



Nitrate of soda 



Phosphoric Acid in 



Low-grade complete fertilizers 



Medium-grade complete fertilizers ... 



Medium high-grade complete fertilizers.. 



High-grade complete fertilizers 



Phosphoric acid and potash mixtures 



Acid phosphate or dissolved rock 



Bone (total) 



