New York Agricultural Experiment Station. GOO 



Table XVIII (concluded) 



Calcium and Magnesium in 



Calcium carbonate (ground limestone, marl, 



etc.) 



Calcium hydroxide (slaked or hydrated lime) . . 

 Calcium oxide (quicklime, burned lime, etc.) . . 

 Mixtures of compounds of calcium, phosphoric 



acid, etc 



Highest. 



Cents. 



0.95 

 0.73 

 0.65 



1.50 



Lowest. 



Cents. 



0.50 

 0.55 

 0.40 



0.70 



Average. 



Cents. 



72 

 65 

 52 



95 



II. THE RELATION OF GUARANTEED TO ACTUAL 

 COMPOSITION IN FERTILIZERS. 



While Bulletin No. 390 gives data that will enable one to calculate 

 the difference between the guaranteed and actual composition of 

 fertilizers in individual samples, it is desirable to have a more compre- 

 hensive knowledge of present conditions than can be obtained by such 

 a casual examination. The following tables will furnish numerous 

 details relating to this feature in connection with complete fertilizers. 



Table XIX. — Difference Between Guaranteed and Actual Percentages of 

 Nitrogen, Phosphoric Acid and Potash in Complete Fertilizers. 



