Boron Distribution in Soils and Waters of Egypt1
- Ahmed A. Elseewi and
- A. E. Elmalky2
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.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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