yield of navel oranges is sufficient to warrant such 

 application with profit. 



This is particularly true of trees over ten years 

 old. If the fertilizer is low grade, the amount used 

 should be doubled. 



METHOD OF APPLICATION. 



The best method of application is undoubtedly 

 by drill, on account of its labor saving and uniformity. 

 Though not over five inches deep, the drill covers the 

 fertilizer, which can be placed deeper by subsequent 

 plowing. The use of drill obviates the unpleasant- 

 ness of applying in any winds which may prevail. No 

 hand process is so uniform or inexpensive, though 

 some other methods place the fertilizer deeper. It is 

 well worth the extra cost to hire a hand to follow 

 each plow furrow and place the fertilizer that depth. 



STABLE MANURE. 



An average analysis of one ton of horse manure 

 would be : 



Nitrogen 0.50% or 10 Ibs.of a ton at 16c ..$1.60 



Phosphoric acid 0.25% or51bs. of atonatGc... .30 

 Potash 0.40% or 9.6 Ibs. of a ton at 6c 58 



$2.48 



The commercial value of the plant food is then 

 about $2.50 per ton. Barn yard manure, when cared 

 for properly, is a most profitable form of fertilizer, 



39 



