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Soil Science Society of America Journal Abstract -

Summertime Flooding Effects on Alfalfa Mortality, Soil Oxygen Concentrations, and Matric Potential in a Silty Clay Loam Soil1


This article in SSSAJ

  1. Vol. 44 No. 2, p. 433-435
    Received: Mar 19, 1979
    Accepted: Oct 19, 1979

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  1. B. D. Meek,
  2. T. J. Donovan and
  3. L. E. Graham2



Soil oxygen levels and soil water matric potentials were measured at the 15-, 30-, and 60-cm depths in plots subjected to flooding times of 15, 25, 35, and 45 hours. A decrease to 6% O2 or less in the soil for > 24 hours resulted in substantial losses of alfalfa (Medicago sativa L.). Soil O2 content decreased more at the 15-cm depth as compared with the 30- or 60-cm depths because of higher matric potential. The critical matric potential that restricted O2 movement was about −11 cbars.

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