Calcium
Studies with red onions in the US show the positive effect of calcium in onions stored at low temperatures.
Avoiding Chilling Injury in Onions
Onions thrive best when temperatures are cool during early development and then warmer and sunny during maturity. Nutrition programs containing soluble calcium can help to protect crops against chilling injury, which can lead to cell breakdown.
Crop Nutrition and Chilling Injury in Onions
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