Phosphorus deficiency - Rye

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Nutrients

Cereals - Discolouration

Symptoms
Plants are stunted and show purple tints on their dark green leaves, veins and stems. The older leaves, affected first, often senesce prematurely.

Reasons
Phosphorus deficiency Spring cereals may show reddening/purpling of older leaves in cold weather. Root and stem damage or poor soil consolidation can cause similar symptoms, too.

Cereals - Growth retardation

Symptoms
Plants are stunted and show purple tints on their stems.

Reasons
Phosphorus deficiency on young plants Spring cereals may show reddening/purpling of older leaves in cold weather. Root and stem damage or poor soil consolidation can cause similar symptoms, too.

Cereals - Growth retardation

Symptoms
Plants are stunted and show purple tints, especially on the middle of older leaves. Leaf veins and stems are concerned, too. Leaf size is dimished.

Reasons
Phosphorus deficiency Spring cereals may show reddening/purpling of older leaves in cold weather. Root and stem damage or poor soil consolidation can cause similar symptoms, too.

Cereals - Growth retardation

Symptoms
Ear size is severely stunted.

Reasons
Phosphorus deficiency (right)

Cereals - Growth retardation

Symptoms
Growth of deficient plants is severely stunted. Leaf color is a slightly paler than normal.

Reasons
Phosphorus deficiency in different levels (left) compared to healthy plant

Cereals - Growth retardation

Symptoms
Plants with P deficiency are smaller than normal and show purple tints on their dark green leaves, especially on the middle of the leaf blade. K deficient leaves are even more stunted and their tips are scorched.

Reasons
P and K deficiency vs. optimum supply Spring cereals may show reddening/purpling of older leaves in cold weather. Root and stem damage or poor soil consolidation can cause similar symptoms, too.

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

Better crop establishment
Improved early root development
Improved yield
Even crop maturation

Yara recommended fertilizers for Phosphorus

YaraVita MAGPHOS K

Cereals: 5 l/ha at tillering. Repeat at 10-14 day intervals if necessary. Also apply from ear emergence until the end of flowering (Zadok's G.S. 51 to 69). Water rate: 200 l/ha.

YaraVita MAIZE BOOST

Cereals: 5 l/ha at tillering. Repeat at 10 to 14 day intervals if necessary. Water rate: 200 l/ha.

Other recommended products

YaraMila ACTYVA S

YaraVita SENIPHOS

Cereals: 5 l/ha at tillering. Repeat at 10-14 day intervals if necessary. Water rate: 200 l/ha.