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This article in CS

  1. Vol. 22 No. 2, p. 437-440
    Received: Jan 5, 1981

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Permeability of Dry Soybean Pods to Water

  1. Raymond E. Tully1



A new rapid technique was devised to measure the permeability of dry soybean [Glycine max (L.) Merr.] pods to water. An apparatus was constructed for exposing the outer surface of a pod to 0.1 M NaCl electrolyte and the inner surface to mercury. A computer-controlled digital circuit was used to monitor the resistance drop across the pod wall, which was correlated with time of moisture penetration. Preliminary results showed up to an 11-fold difference in median penetration times among six soybean genotypes tested. The method is suitable for screening soybean lines for potential resistance to field weathering caused by rain.

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