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This article in SSSAJ

  1. Vol. 33 No. 6, p. 905-908
    Received: Apr 10, 1969
    Accepted: July 18, 1969

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Bicarbonate Accumulation and pH Changes at the Soybean (Glycine max (L.) Merr.) Root-Soil Interface1

  1. D. Riley and
  2. S. A. Barber2



Investigation of the root-soil interface environment of soybean roots showed an accumulation of HCO3 and an increase in pH as compared to the original soil. The magnitude of the HCO3 accumulation and pH increases was related to the NO3 level of the soil solution. This effect was attributed to a greater uptake of anions than cations by the plant so that HCO3 release maintained electrical neutrality. The pH increased by as much as one unit and HCO3 accumulation was as great as 35 meq/100 g of dry roots.

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