Mineral N dynamics in bare and cropped Leucaena leucocephala and Dactyladenia barteri alley cropping systems after the addition of [sup15]N--labelled leaf residues.

Examines the dynamics of mineral nitrogen (N) in Leucaena leucocephala and Dactyladenia barteri alley cropping systems in Europe. Application of N-labelled leaf residues on bare and cropped microplots; Differences in the nitrate in the profile between the bare and the cropped microplots; Strategies for reducing nitrate losses.