- Wheeler, Laurin
University of Arkansas, Fayetteville, Arkansas
- Ku, Timothy T.
University of Arkansas, Monticello, Arkansas
- Colvin, Robert J.
University of Arkansas, Hope, Arkansas
Site preparation and fertilization increased nitrate-N leaching in a loblolly shortleaf pine stand. Site preparation with burning increased nitrate-N to a maximum of 18 ppm as compared to 5 ppm without. Nitrate in soil water returned to baseline conditions within about one year. Nitrate leaching from fertilization was greater in uneven-aged stands than in even-aged ones. There was no direct effect on leaching from hexazinone application or controlled burning. Hexazinone applied after fertilizer did increase nitrate leaching by reducing its uptake.