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This article in JEQ

  1. Vol. 17 No. 1, p. 146-148
     
    Received: Mar 5, 1987


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doi:10.2134/jeq1988.00472425001700010024x

Tungsten Content of Soils, Plants, and Sewage Sludges in Iowa

  1. M. H. Fu and
  2. M. A. Tabatabai *
  1. Department of Agronomy, Iowa State Univ., Ames, IA 50011.

Abstract

Abstract

Information on the W content in environmental matrices is desired. Because of the antagonistic effect of W on Mo nutrition of plants and microorganisms, this study was conducted to assess the concentration of W in soils, plant materials, and sewage sludges in Iowa. Results showed that the total W in 18 soils ranged from 0 to 2 mg kg−1, with mean and median values of 0.89 and 0.88 mg kg−1, respectively. The corresponding values for 22 plant materials ranged from 0 to 0.35 mg kg−1, with mean and median values of 0.18 and 0.17 mg kg−1. Analysis of 44 sewage sludge samples from different wastewater-treatment plants in Iowa showed that the concentration of this element varied from 0.5 to 62 mg kg−1, with mean and median values of 4.3 and 2.2 mg kg−1, respectively.

Projects 2112 and 2710. Journal Paper no. J-12611 of the Iowa Agric. and Home Economics Exp. Stn.

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