Phosphorus Deficiency - Oilseed Rape

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10750-phosphorus deficiency - oil seed rape-main image

Symptom description

Dark green, older leaves show a reddish/purple discoloration.

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.

Important for

Improved crop establishment. Improved winter hardiness. Improved yield.

Cause description

Phosphorus deficiency

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Yara recommends


Oilseed Rape: For a single application, 5 l/ha at onset of stem extension. For moderate deficiency, 5 l/ha at 4 to 6 leaf stage and at onset of stem extension. An extra application can be made 10 to 14 days later for severe deficiency. Avoid flowering. Water rate: 200 l/ha

Other recommended products (1)


Oilseed Rape: 2.5 to 5 kg/ha. Repeat at 10 to 14 day intervals as necessary. Avoid applications during flowering. Water rate: 200 l/ha.