| dc.contributor.author | Gungula, D.T. |
| dc.contributor.author | Kling, J. |
| dc.contributor.author | Togun, A. |
| dc.date.accessioned | 2019-12-04T11:21:02Z |
| dc.date.available | 2019-12-04T11:21:02Z |
| dc.date.issued | 2003 |
| dc.identifier.citation | Gungula, D.T., Kling, J. & Togun, A. (2003). CERESmaize predictions of maize phenology under nitrogenstressed conditions in Nigeria. Agronomy Journal, 95, 892-899. |
| dc.identifier.issn | 0002-1962 |
| dc.identifier.uri | https://hdl.handle.net/20.500.12478/3641 |
| dc.description.abstract | Simulation models have the potential of greatly enhancing decision-making by farmers and researchers in Nigeria. These models however, need to be adapted before use. This study was conducted to test the phenology module of CERES-Maize model version 3.5 under varying N rates as a step toward adapting the model in the Southern Guinea Savanna of Nigeria. Data on seven late-maturing cultivars of maize (Zea mays L.) grown under 0, 30, 60, 90, and 120 kg N ha−1 in the field for two seasons were used for running the model. There was a linear relationship between N rates and days to silking and maturity with R 2 values of > 0.70 for most of the cultivars, indicating that N strongly influenced phenology. Predictions of days to silking at high N rates (90 and 120 kg N ha−1) were close, with most prediction errors of <2 d. The highest deviations in the calibration results were 4 and 2 d for 90 and 120 kg N ha−1, respectively, while in the validation results, they were 1 and 2 d. Similarly, days to maturity were closely predicted by the model at high N rates with <2-d deviations for most predictions. At low N rates, however, there were greater deviations in model predictions. This shows that the CERES-Maize model can be reliably used for predicting maize phenology only under nonlimiting N conditions. Thus, a N stress factor needs to be incorporated into the model for more accurate phenology prediction in low-N tropical soils. |
| dc.language.iso | en |
| dc.subject | Maize |
| dc.subject | Cultivars |
| dc.subject | Maize Phenology Model |
| dc.title | CERES-maize predictions of maize phenology under nitrogenstressed conditions in Nigeria |
| dc.type | Journal Article |
| dc.description.version | Peer Review |
| cg.contributor.affiliation | Federal University of Agriculture, Nigeria |
| cg.contributor.affiliation | International Institute of Tropical Agriculture |
| cg.contributor.affiliation | University of Ibadan |
| cg.coverage.region | Africa |
| cg.coverage.region | West Africa |
| cg.coverage.country | Nigeria |
| cg.isijournal | ISI Journal |
| cg.authorship.types | CGIAR and developing country institute |
| cg.iitasubject | Plant Breeding |
| cg.iitasubject | Maize |
| cg.accessibilitystatus | Limited Access |
| local.dspaceid | 95796 |
| cg.identifier.doi | https://doi.org/10.2134/agronj2003.8920 |
