Nitrogen deficiency on orange-Citrus

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Nutrients

Citrus - Chlorosis

Symptoms
The older leaves are pale green to yellow and abscise. The life of a leaf can be shortened from 1-3 years to 6 months. The leaf veins have a clear colour tending to white.

Reasons
Nitrogen deficiency Sulfur deficiency causes similar symptoms, but it begins at the younger leaves and the veins are usually green.

Nitrogen deficiency on orange made worse by

Low or high pH soils
Sandy or light soils (leaching
) Low organic matter
Drought conditions
High rainfall (leaching) or heavy irrigation
Addition or high levels of non-decomposed organic matter/manure (eg straw)
Fast growing crops

Nitrogen is important for

Foliage lusher and greener
Shoot growth vigour increased
Fruit set/crop load increased
Yield is increased
Juice quantity and quality improved (acidity and soluble solids increased)

Yara recommended fertilizers for Nitrogen

YaraTera CALCINIT

Citrus: Apply 400 kg/ha in multiple applications from growth stage; new flush to early fruit development. Refer to Yara crop program as a guide or contact your local Yara sales agronomist for advice.

YaraMila COMPLEX

Citrus: Apply 550-750 kg/ha in multiple applications from growth stage; new flush to fruit bulking/maturity. Refer to Yara crop program as a guide or contact your local Yara sales agronomist for advice.