Submitted to: American Society of Agronomy Branch Meeting
Publication Type: Abstract Only
Publication Acceptance Date: 1/15/1999
Publication Date: N/A
Technical Abstract: Alum additions to poultry litter have been shown to reduce ammonia volatilization and phosphorus runoff. The objective of this study was to determine the long-term effects of normal poultry litter, alum-treated litter, and ammonium nitrate. After three years the water soluble P levels in soil increased dramatically in plots fertilized with normal litter, particularly at the higher rates. This was not the case with alum-treated litter, which showed no significant effect on water soluble P compared to the unfertilized control plots. Soil pH was reduced by ammonium nitrate, but not by normal or alum-treated litter. Reductions in soil pH with ammonium nitrate resulted in increased exchangeable aluminum.