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This article in AJ

  1. Vol. 61 No. 3, p. 398-402
     
    Received: Sept 27, 1968
    Published: May, 1969


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doi:10.2134/agronj1969.00021962006100030020x

Root Growth Pressures of Cotton, Peas, and Peanuts1

  1. Howard M. Taylor and
  2. Larry F. Ratliff2

Abstract

Abstract

The root growth force that cotton (Gossypium hirsutum L. ‘Coker 413–68’), pea (Pisum sativum L. ‘Brunswick’), and peanut (Arachis hypogaea L. ‘Virginia Bunch’) seedlings developed was measured with an unbonded strain gage force transducer. Root growth pressure, defined as root growth force per unit root cross-sectional area, averaged 9.4, 13.0, and 11.5 bars for cotton, peas, and peanuts, respectively, but values varied widely within each variety. Osmotic potential and root growth pressure results supported Pfetter's contention that cellular osmotic potential created the stress necessary for root growth pressure development.

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