Phosphorus deficiency-Apples | Yara New Zealand

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Nutrients

Apples - Spongy tissue

Symptoms
Low phosphor concentrations in fruits produce "low temperature breakdown", shown by brown and soft areas within flesh in store. Only at progressed stage damage is visible from the outside. Fruits are squashy and show brown areas on surface.

Reasons
Phosphor deficiency

Apples - Spongy tissue

Symptoms
Low phosphor concentrations in fruits produce "low temperature breakdown", shown by brown and soft areas within flesh in store. At progressed stage damage is visible from the outside. Fruits are brown and squashy.

Reasons
Phosphorus deficiency

Phosphorus deficiency made worse by

Acidic or very alkaline (calcareaus) soils
Low organic matter
Cold or wet conditions
Crops with a poorly developed root system
Soils with low P reserves
Soils with a high phosphate capacity
Iron rich soils

Phosphorus is important for

Increases fruit size
Gives better colour
Increases firmness
Reduces storage disorders
Increase fruit calcium levels

Yara recommended fertilizers for Phosphorus

YaraVita PHOZTRAC

Apple: 5 l/ha starting 6 weeks after petal fall and repeat at 7 to 14 day intervals. Do not apply within 1 month of harvest. Water rate: 500-2000 l/ha.