COST OF POTASH. 



The sulphate yielding 49% actual potash can be 

 bought for $60 per ton, making the actual potash 

 cost 6c. per pound or $1.20 per unit, or 20 pounds 

 of a ton. 



MOST ECONOMICAL FORM OF FERTILIZERS. 



If the price of nitrogen is the same in nitrates, 

 and bone and blood, the cheapest is that which 

 becomes available just as fast as the tree wants it, 

 neither faster nor slower. Is nitrate too quickly 

 soluble for the tree to use all of it before a part of it 

 is carried away by waste water? Is ground bone 

 too slowly available or blood and bone just right? 

 Who will tell, and how? It is a fine problem. 



If a form of plant food becomes available too 

 rapidly, the moisture holding it in solution rises and 

 evaporates, leaving this soluble, valuable, food on 

 the top of the ground, whence it is partly lost by 

 escaping surface waters, and part carried back into 

 the soil by penetrating moisture. That is why slow- 

 running water gives the most profitable irrigation. 

 A "waste water " right on one ranch from another 

 becomes also a fertilizer right, provided the other 

 man fertilized. 



If, however, some form of plant food, not so 

 quickly soluble in running water as nitrate of soda, 

 and yet readily soluble by soil moisture and root 



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