Table 1. Leaf analysis standards for nutrient levels in young, non-bearing 

 apple trees. 



Element 



Ni t rogen (N) 

 Potassium (K) 

 Cal ci urn (Ca) 

 Magnesium (Mg) 

 Manganese (Mn) 

 Boron (B) 

 Copper (Cu) 

 Zinc (Zn) 



1 



Shortage: Corrective measures needed. 

 2 



Optimum: Applications should be continued as present rate or increased 

 to tree age. 

 3 



Excess: Amount applied should be decreased or eliminated. 

 k 



Don't be concerned about low B levels until trees begin to fruit. 



Young trees, particularly those on weak size-control rootstocks, are 



eas i ly i njured by B. 



Table 2. Standards for nutrient levels in leaves for bearing apple trees. 



1 



Shortage: Corrective measures needed, 

 2 

 Optimum: Applications should be continued at present rate or adjusted 

 according to anticipated crop size. 



3 

 Excess: Amount applied should be decreased or eliminated. 



^4 



N levels of 2.0-2.50% for non-bearing trees and trees of firm-fleshed 

 varieties (Empire, Spartan, Delicious, Idared, etc.) are satisfactory. 

 On Golden Delicious 1.70-1.80% is best. 



