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Synopsis: Ability to germinate under moisture tension was not related to ability to harden under tension. Significant differences among varieties in uptake of N, P, and K under moisture stress were noted, but they were not related to relative hardiness. Evidence of correlation of relative hardiness in embryo, seedling, and youngplant stages of development was found. Gibberellic acid stimulated seedling growth more at higher than at lower moisture tensions.
2 Graduate student, and Associate Professor of Agronomy, Kansas Agr. Exp. Sta.; and Research Agronomist, Crops Research Division, ARS, USDA, Manhattan.
Received for publication August 8, 1962.
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