University of California

Lead quantities in plants, soil, and air near some major highways in southern California


A. L. Page
T. J. Ganje
M. S. Joshi

Authors Affiliations

A. L. Page was Associate Professor of Soil Science and Associate Chemist, Department of Soil Science and Agricultural Engineering, Riverside; T. J. Ganje was Research Associate IV, Department of Soil Science and Agricultural Engineering, Riverside; M. S. Joshi was Research Chemist, Statewide Air Pollution Research Center, University of California, Riverside, and is presently in the Department of Metallurgy Mining and Geology, Royal Melbourne Institute of Technology, Melbourne, Australia.

Publication Information

Hilgardia 41(1):1-31. DOI:10.3733/hilg.v41n01p001. July 1971.

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The lead contents of 27 varieties of consumer crops and plants sampled at various distances from some major highways in southern California and in local markets were carefully determined. Amounts in and on crops grown close to these highways were shown to be influenced by (a) distance from the highway, (b) extent of plant surface exposed, (c) external plant characteristics, (d) duration of plant exposure, (e) motor vehicle traffic density, and (f) direction of prevailing winds. In soils and suspended air particulates, concentrations of lead were influenced by distance from highway and direction of prevailing winds. All results demonstrated that lead accumulations in and on plants next to these highways in southern California were caused principally by aerial deposition and not by—at least to any great extent—absorption by the plant from lead-contaminated soil.

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Page A, Ganje T, Joshi M. 1971. Lead quantities in plants, soil, and air near some major highways in southern California. Hilgardia 41(1):1-31. DOI:10.3733/hilg.v41n01p001
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