Symptom description: Low calcium concentrations produce bitter pit shown by depressed areas on apple surface and small, brown corky areas within flesh
Made worse by: Acidic soils. Sandy or light soils (leaching). Acid peat soils. Soils rich in sodium. Soils rich in aluminium. Drought conditions. Fruit high in nitrogen or potassium. Large fruit.
Important for: Reduces Bitter Pit and other related disorders. Increases fruit size. Gives better fruit colour. Increases fruit firmness. Reduces storage disorders.
Cause description: Calcium deficiency (left) May be confused with boron deficiency. But boron deficiency causes symptoms in early state of fruit development, while calcium deficiency gives symptoms a few weeks before harvesting or in store.
Our expert advices to apple growers are to apply VAN IPEREN fertilisers from Calcium products like
Calcium nitrate Horticultural grade
Calcium nitrate Agricultural Grade
Calcium nitrate Fertigation grade
Calcium chloride Horticaltural grade
Calcium nitrate liquid
Calcium chloride 35% Liquid
For more information for these products and method of application, doses and concentration of application you can receive from our professional agro-team at HORTICENTAR — Greenhouse training center.