Agronomy Journal Journal of Natural Resources and Life Sciences Education
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Published online 1 November 1957
Published in Agron J 49:586-589 (1957)
© 1957 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Influence of Organic Additions and Flooding on Iron and Manganese Uptake by Rice1

Francis Clark, D. C. Nearpass and A. W. Specht2

Synopsis: Organic amendments in addition to flooding were injurious to rice yields and increased plant Fe uptake but decreased Mn. The Fe levels in plants grown submerged in water and unsubmerged without organic amendments were found comparable, but the submerged yields were higher and were accompanied by a Mn uptake more than tenfold that of rice grown unsubmerged. Marked yield response to Mn was obtained in upland cultures. Levels of Mn found in plants indicate that rice has a high requirement for and an exceptionally high tolerance to Mn.

1 A contribution from the Soil and Water Conservation and the Crops Research Divisions, A.R.S, U.S.D.A., Beltsville, Maryland. These investigations supported in part by funds provided by International Cooperation Administration under Special Agreement for Technical Services on Salinity and Soil Fertility. Presented before Division III, Soil Science Society of America, at Cincinnati, Ohio, November 15, 1956.

2 Principal Microbiologist, Soil Scientist, and Senior Chemist, respectively.

Received for publication April 8, 1957.




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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 © 1957 by the American Society of Agronomy.