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 Google Scholar Google Scholar Articles by Geering, H. R. Articles by Sdano, C. Search for Related Content PubMed Articles by Geering, H. R. Articles by Sdano, C. Agricola Articles by Geering, H. R. Articles by Sdano, C.

Micronutrient Cation Complexes in Soil Solution: IV. The Chemical State of Manganese in Soil Solution¹

ABSTRACT

Soil solutions from several areas of the US were analyzed by atomic absorption for total Mn and by resin exchange for percent Mn complexed. Values for the latter (84%–99%) in soil solution from the A horizon were intermediate to those previously reported for Zn and Cu. Soil solution from a New York forest soil at pH 7 contained 13 ppm Mn, of which 93% was complexed. Spectrophotometric and polarographic methods were developed to determine the oxidation state of Mn in this soil solution. Both methods indicated the Mn in solution was present in the +2 oxidation state. The presence of such large concentrations of Mn²⁺ in a soil solution of a neutral soil was still less than that predicted from measured values of the Eh of the soil solution and the Mn²⁺/MnO₂ half-cell potential. Soil microorganisms oxidized and precipitated Mn²⁺, presumably as MnO₂, but the presence of the neutral soil solution that contained 13 ppm Mn partially inhibited this precipitation.

Contribution from the U.S. Plant, Soil and Nutrition Laboratory, SWC, ARS, USDA, Ithaca, N.Y., in cooperation with the Department of Agronomy, New York State College of Agriculture, Ithaca. Presented at a symposium—Metal Chelation in Soils—Div. S-2, Soil Science Society of America, Washington, D.C., Nov., 8, 1967.

² Research Associate, Soil Scientist, and Technician, respectively. Second author is also Associate Professor at Cornell University.

Received for publication March 29, 1968. Accepted for publication September 11, 1968.