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Magnesium is particularly important in ensuring even ripening of well-formed fruit, as studies in UK show.
Magnesium also influences the shape of the fruit.
A regular supply is needed throughout the life of the crop. Up to 54lb/ac of magnesium is used by a tomato crop. Magnesium uptake can be depressed by an excess of other cations, so it is important to maintain a correct balance. Particular care is needed in fertigation systems.
|Magnesium at tomato growth stages|
|Vegetative growth||Maximizes concentrations in leaf tissue prior to flowering|
|Flowering - fruit set||Improves flowering and crop production – maximum requirements are at this stage|
|Fruit ripening - maturity||Maximum requirements are at this stage for quality fruit production|