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Abstract
The effects of gibberellic acid, kinetin, abscisic acid and ethrel on the biomass of barley plants (Hordeum distichon L. cv. Pallas) during the preanthesis period has been observed. The various treatments were applied via the roots and two photoperiods (10 and 16h) were experimented with. Ethrel produced the highest increases under both photoperiod conditions,
followed by gibberellic acid in the short photoperiod. Abscisic acid enhanced growth slightly under both conditions. Kinetin, under both photoperiod conditions, and gibberellic acid in the long photoperiod provoked a fall in plant growth.
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