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 language||English (US)|
|Number of pages||5|
|Journal||Soil Science Society of America Journal|
|State||Published - 1984|
ASJC Scopus subject areas
- Soil Science