Nutrients

P Phosphorus
K Potassium
Mg Magnesium
Ca Calcium
S Sulphur
B Boron
Fe Iron
Mn Manganese
Zn Zinc
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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.

Causes
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.

Causes
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 fertilisers for Phosphorus deficiency

YaraVita SENIPHOS

YaraVita SENIPHOS

Apple: 5-8 applications of 10 l/ha at 10-14 day intervals commencing at petal fall. Water rate: 500 l/ha. For red coloration: Seniphos at 10 l/ha in 1,000 litres of water has been shown to enhance red colouration. 1 or 2 applications (7 days apart) should be made once the fruit has started to change colour, normally 2 to 3 weeks before harvest.

Read more about YaraVita SENIPHOS

Other recommended products

YaraVita BUD BUILDER FL
YaraVita BUD BUILDER FL
Apple: 10 l/ha applied post-harvest before leaf fall. Also, 5 to 10 l/ha applied at bud burst. Water rate: 500 to 1000 l/ha.
YaraVita FOLIAR POTASH
YaraVita FOLIAR POTASH
Apple: 5 l/ha at bud burst. Also, two to three applications of 2 to 3 l/ha at 10 to 14 day intervals starting at petal fall. A further application of 5 l/ha may also be applied post-harvest before leaf fall. Water rate: 500 l/ha.