1a.Objectives (from AD-416)
Develop improved nitrogen management practices for poultry litter by utilizing conservation crops and high-residue tillage to reduce nitrogen loss to groundwater and the atmosphere.
1b.Approach (from AD-416)
Conduct field research to measure parameters to describe nitrogen release from poultry litter and nitrogen uptake of rye cover crops for the EPIC model. Conduct field research to evaluate high-residue tillage implements for reducing ammonia loss from poultry litter.
Progress to date includes completion of specific treatment designs and experimental designs and the start of field research to study the nitrogen dynamics of rye cover crops and the evaluation of high-residue tillage equipment. These studies are being carried out at the Wye Research and Education Center and are summarizing the ability of using the heat unit concept to guide the growth and development of a rye cover crop. The turbo-till high-residue tillage implement is also being evaluated in replicated continuous corn plots for its ability to conserve surface residues and reduce ammonia volatilization as compared to a surface application of litter or a traditional tandom disk incorporation. Progress for this project was monitored by weekly phone conversations with a researcher at Wye which provided timely information to optimize sampling and field operations at Wye which is about 60 miles away from Beltsville.