Loblolly Pine Gibberellic Acid Experiment

Loblolly Pine Gibberellic Acid Experiment

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Credit: USDA/OMIKRON/SCIENCE PHOTO LIBRARY

Caption: A favorable response to an experimental gibberellic acid treatment is illustrated by the 2-year-old loblolly pine at right. When this greenhouse plant was a year old, it was sprayed once with a solution containing 400 p.p.m. of gibberellic acid. A year later it has a stem twice as thick as the untreated pine at left, and moderately taller.

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Keywords: color, comparison, enhance, enhancement, experiment, gibberellic acid treatment, greenhouse plant, loblolly pine, pine, pine tree, plant biology, tree treatment

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