172 Peach-Growing 



1. Nitrate of soda — Ij lbs. to a tree. 



2. Acid phosphate — 2| lbs. to a tree. 



3. Muriate of potash — 1 lb. to a tree. 

 . J Nitrate of soda — 1| lbs. to a tree. 



\ Acid phosphate — 2| lbs. to a tree. 



- J Nitrate of soda — Ij lbs. to a tree. 



\ Muriate of potash — 1 lb. to a tree. 



6. Check — no fertilizer. 



f Acid phosphate — 2j lbs. to a tree. 



* I Muriate of potash — 1 lb. to a tree. 



{Nitrate of soda — Ij lbs. to a tree. 



Acid phosphate — 2| lbs. to a tree. 



Muriate of potash — 1 lb. to a tree. 



9. Check — no fertilizer. 



10. Lime — 10 lbs. to a tree. 



With these combinations of plant-foods it is possible for 

 a grower to observe the response of his trees to any one 

 element used alone, to any two used together, and to all 

 three combined thus making a complete fertilizer. It is 

 not essential to include lime in the experiment but it is well 

 to do so. If some of the plant-food combinations are also 

 used in conjunction with lime it will add to the complete- 

 ness of the experiment, as will the use of stable manure on 

 one group of trees, for comparison with the commercial 

 plant-foods. Furthermore, it may be of very material ad- 

 vantage to add still one more group which shall be the same 

 combinations as No. 8 but with a considerable increase in 

 the quantity of the materials used, perhaps even doubling 

 them. The other groups would indicate strongly what 

 plant-food or combination of foods was needed, while this 

 additional group similar to No. 8 except in quantity would 

 help the grower to decide how much of the different ele- 

 ments should be applied. 



