Abstract Efficient N-fertiliser management during the
corn (Zea mays L.) phase in corn-forage rotation requires
information on temporal dynamics of N release
from forage biomass. The influence of forage phase, in
corn-forage rotation, and no- versus conventional-till
on (1) in situ temporal dynamics of soil nitrate-N (NO3-
N) during corn phase and (2) corn grain yield was investigated
in this study. The data used were collected
from a crop rotation (corn-forage) experiment, with superimposed
tillage treatments, established on a silt
loam soil in 1988 and continued until 1994. The cropping
treatments were continuous conventionally cultivated
(CT) corn, rotations involving corn and forages
(alfalfa, Medicago sativa L.; and bromegrass, Bromus