CHEMISTRY OF FERTILIZERS 5 



use too large quantities at a time; and, ordi- 

 narily, it is best to use it in connection with a 

 liberal application of nutritive fertilizers. Lime 

 can be used with much advantage on freshly 

 drained swamp-lands and also on lands newly 

 cleared. 



Fertilizer dealers and manufacturers treat the 

 different forms of fertilizers and fertilizer materials 

 separately, and it is important that one should 

 be familiar with these trade names, and under- 

 stand what they mean. 



The following list contains most of the terms 

 used in stating fertilizer analyses. 



Nitrogen is expressed as: (A) Nitrogen, 

 (B) Ammonia, (C) Nitrogen equal (or equivalent) 

 to Ammonia. 



Phosphoric Acid is expressed as: (A) Phos- 

 phoric Acid, (B) Soluble Phosphoric Acid, (C) 

 Reverted Phosphoric Acid, (D) Precipitated Phos- 

 phoric Acid, (E) Available Phosphoric Acid, 

 (F) Soluble and Available Phosphoric Acid, (G) 

 Insoluble Phosphoric Acid, (H) Total Phosphoric 

 Acid, (7) Phosphoric Acid equal (or equivalent) 

 to Bone Phosphate of Lime. 



Potash is expressed as: (A) Potash, (B) 

 Potash (actual), (C) Potash S. (or Sul.), (D) 

 Potash (Soluble), (E) Potash as Sulphate, (F) 

 Potash equal (or equivalent) to Sulphate of 

 Potash, (G) Sulphate of Potash, (H) Potassium 

 Oxide. 



(A) Nitrogen is a gas, and, in this form, can- 



