HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Gerstl, Z. Articles by Nye, P. H. Search for Related Content PubMed Articles by Gerstl, Z. Articles by Nye, P. H. Agricola Articles by Gerstl, Z. Articles by Nye, P. H.

Diffusion of a Biodegradable Pesticide: I. In a Biologically Inactive Soil¹

ABSTRACT

The diffusion of parathion (O,O-diethyl O-p-nitrophenyl phosphorothioate) in a biologically inert ("sterile") loamy soil (Gilat – Israel) was investigated. It was found that the diffusion coefficient (D) of parathion in Gilat soil over a large range of moisture contents varies between 0.66 x 10^–7 and 3.39 x 10^–7 cm²/sec. The main factors affecting the diffusion of parathion in a "sterile" soil are the adsorption coefficient of the compound on the soil surfaces (K), the moisture content, and the impedance factor (f). The variables K and f were measured independently and the experimental values of D were compared with the theoretical values. Only a small fraction of adsorbed parathion was undergoing diffusion, the mobile fraction of the adsorbed molecules being about 10% of the total adsorbed parathion.

¹ Contribution from the Department of Agricultural Science, University of Oxford, Oxford, U.K.

² Research Associate, Visiting Fellow, and Reader in Soil Science, respectively. The permanent address of Z. Gerstl and B. Yaron is: Institute of Soils and Water, Volcani Center, Bet-Dagan, Israel.

Received for publication December 1, 1978. Accepted for publication April 18, 1979.

This article has been cited by other articles:

				J. Gamst, P. Moldrup, D. E. Rolston, T. Olesen, K. Scow, and T. Komatsu Comparison of Naphthalene Diffusion and Nonequilibrium Adsorption-Desorption Experiments Soil Sci. Soc. Am. J., May 1, 2003; 67(3): 765 - 777. [Abstract] [Full Text] [PDF]