Phosphorus deficiency - Citrus

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Nutrients

Citrus - Chlorosis

Symptoms
Symptoms begin at the mature leaves. They partly turn yellow. In severe cases small brownish to bronze freckles occur, spread over the leaf blade and coalesce. This discoloration is first appearing along the main veins.

Reasons
Phosphorus deficiency on leaf

Citrus - Chlorosis

Symptoms
Symptoms begin at the mature leaves.They partly turn yellow. In severe cases small brownish to bronze freckles occur, spread over the leaf blade and coalesce. This discoloration is first appearing along the main veins.

Reasons
Phosphorus deficiency on leaf

Citrus - Deformation

Symptoms
Phosphorus deficiency leads to fruits with coarse and thick peel.

Reasons
Phosphorus deficiency on orange (right)

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

Vegetative growth increased
Leaves are much greener
Fruit set is increased
Yield boosted, fruit quality enhanced (sugar/acid improved)
Particularly important in young trees with poorly developed root systems

Yara recommended fertilizers for Phosphorus

YaraMila COMPLEX

Citrus: Apply YaraMila Complex @ 400 grams/plant (soil application) at Pre-flowering stage. @ 250 grams/plant (soil application) at Flowering to Fruit Setting stage. @ 500 grams/plant ( Fertigaton) at Pre - Flowering Stage.

YaraTera KRISTA MAP

Citrus: Apply KRISTA MAP (Fertigation) @ 25kg/acre (1 kg/day/acre) at Flowering stage( 20-45 days)

YaraTera KRISTA MKP

Citrus: Apply KRISTA MKP (Soil Application) @10g/litre water (Foliar Spray) at Post Harvest Stage Apply KRISTA MKP (Fertigation) @30 kg/acre (0.5 kg/day/acre) at Fruit Development Stage (136-165 days)

DELTASPRAY 19-19-19

Citrus: Apply DELTASPRAY (Fertigation) @ 45kg/acre (1.5 kg/day/acre) at Fruit Set Stage (46-75 days)