Food for Plants. 



79 





'M: 



Yield without Nitrate. 



V . 



■^;, 



Yield with Nitrate. 



Instructions for Using Nitrate of Soda on Potatoes. 



As soon as the potatoes are up in the spring, or just 

 before planting, apply the Nitrate of Soda by .broadcast- 

 ing it evenly, by hand or by machine, over the entire 

 surface of tlie potato field yon are fertilizing, at the rate 

 of 200 pounds per acre, or apply it broadcast prior to 

 planting. 



Our Formula for Potatoes. 



Nitrate alone 200 lbs. per acre 



or preferably ,, , 



Nitrate 400 



Acid Phosphate 400 



When potash salts can be conveniently obtained we 

 advise the use of fifty pounds of sulphate of potash to 

 the acre every other year. 





