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Low relative humidity (73%–80%) and high relative humidity (94%) lowered the initial rate of calcium penetration from postharvest dip into the tissues of ‘Spartan’ apple fruits ( Malus domestica Borkh.). Moderate storage relative humidity (87%) resulted in the most rapid initial uptake of calcium by the tissues. The effect of humidity on calcium movement into the fruit tissue decreased with time in storage.
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Lidster et al. (1977) studied this question.
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