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This article in SSSAJ

  1. Vol. 43 No. 2, p. 297-300
     
    Received: Mar 20, 1978
    Published: Mar, 1979


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doi:10.2136/sssaj1979.03615995004300020011x

Boron Distribution in Soils and Waters of Egypt1

  1. Ahmed A. Elseewi and
  2. A. E. Elmalky2

Abstract

Abstract

Saturation extract, hot water-soluble, acid-soluble, and total B fractions were determined in soil samples from profiles representing six geographically diverse areas in Egypt. Saturation extract and hot water-soluble B averaged 0.6 µg/ml and 1.3 µg/g. Acid-soluble and total B averaged 10.2 and 113 µg/g. The acid fraction showed a curvilinear relationship with CaCO3 content of the soil, and averaged 12.5% of the total B. Total B, on the average, was twice as high in clay samples as in sandy samples, and decreased by about 32% beyond the 60-cm depth of the soil profile. Concentrations of saturation extract B were either similar to or a reasonable multiple of Nile-Water B, indicating that the latter is a direct source of at least water soluble B in these soils. Concentrations of water and acid-soluble B suggest that B status in soils of Egypt is above the sufficiency level, and that under proper soil and water management the incidence of toxicity is unlikely.

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