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  • Author or Editor: S. L. Wachter x
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The effects of negative air ions from a high voltage electrical discharge unit on growth and development of 9 plant species were studied in growth chambers and/or in the greenhouse. Treatments consisted of ionization during either the light or dark period, as well as untreated controls. In growth chambers, plants grown in ionized air had significantly greater fresh weights in 13 of 16 instances, but were relatively unaffected in dry weights. Ionization treatments in the greenhouse were less effective but treated plants showed increases in tobacco plant height, geranium stem length and lettuce leaf number.

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