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Contribution of zinc fraction to available zinc extracted, by some chemical methods, from rice growing soils of North-Western Himalayas

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Abstract

A laboratory and greenhouse investigation was undertaken to study the distribution and contribution of zinc fractions to available zinc in submerged rice. Most of the total zinc was present as Al- and Fe-oxide bound (52.8%) and residual zinc (27.8%). The exchangeable (non-specifically and specifically absorbed), organically bound and Mn-oxide bound zinc fractions averaged 0.7, 1.1, 6.3 and 4.9 per cent of the total zinc, respectively. 0.1 M HCl, EDTA-(NH4)2CO3 and dithizone extractants showed significant correlation with per cent yield, Zn concentration and zinc uptake by grain and the critical limits were 3.0, 1.9 and 1.0 µg−1, respectively. Organically bound zinc exhibited significant correlation with per cent yield and zinc uptake by grain whereas specifically absorbed zinc correlated with Zn concentration in grain. Mn-oxide boudn zinc and Al- and Fe-oxide bound zinc fractions were also correlated with zinc concentration and zinc uptake by grain.

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Authors and Affiliations

  1. Department of Soil Science and Agricultural Chemistry, G. B. Pant University of Technology, 263141, Pantnagar (Natnital), U.P., India

    Yashodha Pradhan

  2. H. P. Agricultural University, Dist. Kangra, 176062, Palampur, H.P.

    B. B. Kanwar

Authors
  1. Yashodha Pradhan
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  2. B. B. Kanwar
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Pradhan, Y., Kanwar, B.B. Contribution of zinc fraction to available zinc extracted, by some chemical methods, from rice growing soils of North-Western Himalayas. Plant Soil 126, 149–153 (1990). https://doi.org/10.1007/BF00041382

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  • DOI: https://doi.org/10.1007/BF00041382

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