Abstract
DSSAT (Decision Support System for Agrotechnology Transfer) -CERES-Maize was employed to characterize maize yield and nitrogen dynamics in a 50-year maize production study at Woodslee, Ontario, Canada. The treatments selected for evaluation included continuous maize/corn with fertilization (CC-F) and continuous maize/corn without fertilization (CC-NF) treatments. The results showed that the DSSAT model could simulate yield of CC-F more precisely than that of CC-NF. The simulated cumulative nitrate loss from CC-F treatment from 1998 to 2000 was consistent with the actual measured value. For CC-NF, The DSSAT model overestimated the cumulative nitrate loss.
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