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Synopsis Increases in soil moisture tension from 1 through 12 atm. brought about progressively smaller increases in radicle elongation, fresh weight, dry weight, and degree of seedling hydration. Growth properties were most sensitive in the range between 1 and 3 atm. At low moisture stress, oxygen concentration of the root atmosphere needed to be above 10.5% for maximum growth.
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Gingrich et al. (1956) studied this question.
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