Agronomy Journal Journal of Natural Resources and Life Sciences Education
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Published online 1 May 1964
Published in Agron J 56:262-265 (1964)
© 1964 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Available Zinc Status of Wisconsin Soils as Determined by Aspergillus niger1

D. C. Mattens, G. Chesters and J. T. Murdock2

Synopsis: The method involves buffering the test system with oxalic acid to suppress growth of contaminating microorganisms; an incubation period of 8 days at 30° C. is recommended. From statistical analyses the A. niger assay can be used to predict satisfactorily the uptake of Zn by plants particularly if the effects of pH and clay content of the soil are taken into account when making the prediction.

1 Contribution from the Department of Soils, University of Wisconsin, Madison, Wis. Published with the approval of the Director, Wisconsin Agr. Exp. Sta. Supported in part by the Research Committee of the Graduate School with funds supplied by the Wisconsin Alumni Research Foundation.

2 Research Assistant, Assistant Professor, and Associate Professor of Soils, respectively.

Received for publication October 11, 1963.




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The SCI Journals Crop Science Vadose Zone Journal
Journal of Natural Resources
and Life Sciences Education		 Soil Science Society of America Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 1964 by the American Society of Agronomy.