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The effects of bulb vernalization and plastic tunnels on tulip flowering and quality

, : The effects of bulb vernalization and plastic tunnels on tulip flowering and quality. Acta Horticulturae (43(1)): 53-70

In 2 trials in 1970 and 1971 tulip bulbs, Apeldoorn, were refrigerated at 5 deg C for 15, 30, 45 or 60 days and planted in the open or under plastic film tunnels of 0.10, 0.15 or 0.20 mm thickness. Flowering was advanced both by the use of tunnels and by increasing the duration of cold treatment. The thickest plastic film was no better than the 0.15-mm material. The duration of flowering was not affected by the treatments.

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