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Increasing N and Ca levels in apples

Increasing N and Ca levels in apples

Foliar nutrition with Haifa Cal significantly increased Calcium (Ca) content of  apple fruits

Crop/cultivar

Apple/Jonathan x Gala

Country / location Israel / Golan Height (Northern part) ; summer 2005
Objectives Improve yield and fruit quality (storability and combating ‘Bitter Pit’)
Haifa product tested Haifa Cal GG 15.5-0-0 +26.5
Application method Foliar nutrition
Tested treatment 6 x Foliar feeding @ 0.8% Multi-Cal + 0.025% Triton X-100, at 7 days intervals, starting in mid-June.
Control treatment results Ca content (ppm in DM)  in fruit rind - 647
Ca content (ppm in DM)  in fruit flesh - 447
Best treatment results Ca content (ppm in DM)  in fruit rind - 847
Ca content (ppm in DM)  in fruit flesh - 538
Conclusions Haifa Cal significantly increased N and Ca contents of the apple fruits as compared with the unsprayed control.
Fruit hardness and Bitter pit occurrence were not significantly affected by the treatment.
Reference Yoni Gal, Ministry of Agriculture; E. Yonnay- “Golan Fruits“

 

Need more information about how to grow apple tree? You can always return to the apple tree fertilizer & tomato crop guide table of contents