TOBACCO CULTURE. 79 



that dissolves in water and is available for the use of plants. 

 The different forms of potash commonly used in fertilizers 

 are readily soluble in water. 



(e) Potash as Sulphate means simply sulphate of pot- 

 ash. 



(/") Potash equal (or equivalent) to Sulphate of Pot- 

 ash is an expression which means simply sulphate of potash. 



(V) Sulphate of Potash signifies that this compound is 

 actually present in the fertilizer, and that there is no muri- 

 ate present 



(//) Potassium Oxide means the same as potash, or 

 actual potash 



