AMMONIA VOLATILIZATION FROM SURFACE-APPLIED UREA: EFFECT OF HYDROGEN ION BUFFERING CAPACITY.

R. B. Ferguson, D. E. Kissel, J. K. Koelliker, Wes Basel

Research output: Contribution to journalArticlepeer-review

Abstract

The influence of soil pH and soil cation exchange capacity on ammonia volatilization from surface applied ammoniacal nitrogen has been reported in previous studies. Since the hydrolysis of urea-containing N fertilizers causes an increase in alkalinity, a soil's inherent H** plus buffering capacity (defined as the soil's total acidity, comprised of exchangeable acidity plus non-exchangeable, titratable acidity), should exert a dominant influence on the maximum soil pH at the site of urea fertilizer application. The objective of this study was to demonstrate the importance of a soil's H** plus buffering capacity in affecting NH//3 volatilization from surface-applied urea. It is concluded from this work that H** plus buffering capacity of a soil is a better indicator of NH//3 loss potential than a soil's initial pH.

Original languageEnglish (US)
Pages (from-to)578-582
Number of pages5
JournalSoil Science Society of America Journal
Volume48
Issue number3
DOIs
StatePublished - 1984
Externally publishedYes

ASJC Scopus subject areas

  • Soil Science

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