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Rapid determination of EUF-extractable nitrogen and boron

  • P. Kutscha-Lissberg
  • F. Prillinger

Summary

A procedure for the rapid determination of EUF-extractable nitrogen (NH4 +, NO3 - and easily soluble organic N compounds) is described.

In this procedure the EUF-N fractions are oxidized to NO3. The oxidation with peroxodisulfate is accelerated by ultraviolet (UV) radiation. This reduces the time of digestion to about 15 minutes.

The contents of EUF-extractable N are on the average only between 2-8mg/100g soil. Their determination by the new procedure in the form of NO3 is more precise than the results obtained by digestion according to Kjeldahl.

The sum of EUF-extractable N fractions obtained by the new procedure allows to assess the N fertilizer requirements more precisely than is possible when using the EUF-NO3 fractions alone. Therefore this new procedure constitutes a considerable advantage when working out fertilizer recommendations for agricultural practice.

Keywords

EUF-B EUF-NH4 EUF-NO3 EUF-extractable N Rapid determination 

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References

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Copyright information

© Martinus Nijhoff / Dr W. Junk Publishers, The Hague 1982

Authors and Affiliations

  • P. Kutscha-Lissberg
    • 1
  • F. Prillinger
    • 1
  1. 1.Tulln Sugar FactoryTullnAustria

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