Calcium deficiency-Onions | Yara New Zealand

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Nutrients

Onions - Discolouration

Symptoms
Leaf tips - or short lengths of the leaf - die back, without any previous yellowing of the leaf, causing the top of the leaf to fall over and die.<

Reasons
Calcium Deficiency Calcium is a very important nutrient for growth and storage quality of onions.

Onions - Die off

Symptoms
Leaf tips - or short lengths of the leaf - die back, without any previous yellowing of the leaf, causing the top of the leaf to fall over and die.

Reasons
Calcium Deficiency Calcium is a very important nutrient for growth and storage quality of onions.

Calcium deficiency made worse by

Acidic soils
Sandy or light soils (leaching)
Acid peat soils
Soils rich in sodium
Soils rich in aluminium
Drought conditions
Fruit high in nitrogen or potassium
Large fruit

Calcium is important for

Root establishment and elongation as well as early crop growth
Increases plant height and vigor
Ca helps protect the bulbs against diseases and abiotic stress like chilling or salinity

Yara recommended fertilizers for Calcium

YaraVita STOPIT

Onion/Garlic: 5 to 10 l/ha at bulb swelling. Repeat applications at 7 to 10 day intervals as necessary. Water rate: 200-500 l/ha.

YaraLiva NITRABOR

Other recommended products

YaraVita CALTRAC 400

Onion: 3-5 l/ha applied at the 6 leaf stage. Repeat if necessary 10 to 14 days later. Also, 5 l/ha at bulb swelling, repeated once or twice at 10 to 14 day intervals. Water rate: 30-200 l/ha.

YaraTera CALCINIT