FERTILIZER MATERIALS 



41 



Some of the Sources of Chemical Fertilizers 



Percentage composition of materials used as sources of nitrogen (Gorman Kali 

 Works, N.Y. City) 



Nitrate of soda . . 

 Sulfate of ammonia . 

 Dried blood (high 



grade) 



Dried blood (low 



grade) 



Tankage 



Dried fish scrap 

 Cottonseed meal 

 Castor pomace 

 Tobacco stems 



Nitrogen 



15 to 16 

 193^ to 21 



13 to 14 



10 to 11 

 5 to 9 

 9 to 10 

 61^ to 7}4 

 5 to 6 

 2}4 to 3 



Equivalent 



TO 



Ammonia 



to 193^ 

 to 253^ 



16 to 17 



12 to 13 



6 to 11 



11 to 12 



7}4 to 9 



6 to 7 



3 to SH 



Potash 

 K2O 



1}4 to 2 



1 to IH 



2 to 10 



Phos. Acid 

 Total 



2 to 3 



13^ to 2 



9 to 16 



5}4 to 7 



2 to 3 



IM to 2 



H to 1 



Composition of materials used as sources of phosphoric acid (Kali Works) 



Acid phosphate 

 Carolina phos. rock 

 Dissolved bone 



black . 

 Bone meal . 

 Dissolved bone 

 Thomas slag 

 Peruvian guano 



Total 



16 to 19 

 26 to 27 



17 to 20 

 20 to 25 

 15 to 17 

 22 to 24 

 12 to 15 



Avail- 

 able 



14 to 17 



16 to 18 



5 to 8 



13 to 15 



7 to 8 



Insol- 

 uble 



1 to 2 

 26 to 27 



1 to 2 

 15 to 17 



2 to 3 

 22 to 24 



5 to 8 



Nitrogen 



1 to 43^ 



2 to 3 



6 to 10 



Equivalent 



TO 



Ammonia 



ij4:to 5^ 



2}4 to 33^ 

 7Mto 12 



Potash 

 K2O 



m to 4 



Marketed production of phosphate rock in the United States, from the beginning oj 

 the industry in 1867 to 1909, in long tons (Van Horn, U.S. Geol. Surv.) 



