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A nitrogen-balance study using labelled fertilizer in a gas lysimeter

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Summary

A gas lysimeter study showed negligible losses of gaseous N2 or N2O from rhodes grass plants growing in soil fertilized with either (N15H4)2SO4 or KN15O3; isotope recovered from the soil: plant system averaged respectively 100.5% and 98.9%; neither differed significantly from 100%. Small amounts of ammonia were volatilized into lysimeter atmospheres, averaging 0.6% of that applied as labelled ammonium-N and 0.1% of that as nitrate-N. The importance of these findings is discussed in relation to the conduct of N balance studies.

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Authors and Affiliations

  1. C.S.I.R.O. Division of Soils, Cunningham Laboratory, St. Lucia, Brisbane, Australia

    A. E. Martin & P. J. Ross

Authors
  1. A. E. Martin
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  2. P. J. Ross
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Martin, A.E., Ross, P.J. A nitrogen-balance study using labelled fertilizer in a gas lysimeter. Plant Soil 28, 182–186 (1968). https://doi.org/10.1007/BF01349189

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  • DOI: https://doi.org/10.1007/BF01349189

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