SSSAJ Journal of Natural Resources and Life Sciences Education
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published in Soil Sci Soc Am J 45:1000-1002 (1981)
© 1981 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Kennedy, A. C.
Right arrow Articles by Brown, J. R.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Kennedy, A. C.
Right arrow Articles by Brown, J. R.
Agricola
Right arrow Articles by Kennedy, A. C.
Right arrow Articles by Brown, J. R.

A Comparison of Three Extractants for Soil Zinc1

A. C. Kennedy and J. R. Brown2

ABSTRACT

An HEDTA (hydroxyethylenediaminetriacetic acid) soil zinc (Zn) extractant was compared to 0.1M HCL (1) and DTPA [diethylenetri-aminepentacetic acid; (4)] for their value in detecting zinc deficient sites. Published formation constants suggested that HEDTA should be an effective chelator of soil zinc below pH 7.0. Calculations based upon these formation constants were the impetus for further investigation of HEDTA as a zinc extractant. The extractant consisted of 0.005M HEDTA in a 0.1M calcium acetate buffer adjusted to pH 6.0. Ten grams of air-dried soil were shaken with 20 ml of extractant for 30 min. After filtration the concentration of zinc in the filtrate was determined.

Three extractants, HCI, DTPA, and HEDTA, were compared for their ability to extract zinc from soils at 11 sites in Missouri. The three tests were equally successful at separating deficient from nondeficient soils. Zinc extracted by HEDTA varied less within each site than did that extracted by HCI to DTPA.

NOTES

1 Contribution from the Missouri Agric. Exp. Stn. Journal Series no. 8704. Approved 6 Nov. 1980. This work is part of a dissertation presented by the Senior Author in partial fulfillment of the requirement for an M.S. degree in Agronomy at the Univ. of Missouri-Columbia.

2 Graduate Assistant and Professor of Agronomy, respectively.

Received for publication November 19, 1980. Accepted for publication April 16, 1981.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
and Life Sciences Education		 Vadose Zone Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 1981 by the Soil Science Society of America.