Claim · model-written summary
Spatial yield variability existed at only two sites in a wet year (2000).
- Taxon
- corn
Zea mays subsp. mayse0 - Outcome
- spatial yield variabilitye1
- Value
- only two sitese1
- Qualifier
- in a wet year (2000)e1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We evaluated two corn ( Zea mays L.) hybrids at two N rates”
e1“Spatial yield variability existed at all sites in dry years (1999 and 2001) but at only two sites in a wet year (2000)”
Title
Spatial Yield Response of Two Corn Hybrids at Two Nitrogen Levels
Tawainga W. Katsvairo; William J. Cox; Harold M. Van Es; et al. Agronomy Journal 2003. doi:10.2134/agronj2003.1012
Other claims from this paper (9)
- Observation Spatial yield variability existed at all sites in dry years (1999 and 2001).
- Observation Spatial yield difference variability in response to N existed at two of 13 site–year comparisons.
- Observation At a nonmanured site, temporal yield stability across dry years was associated with spatial yield difference variability in response to N (r = 0.96).
- Observation Corn responded to the higher N rate on 25% of a field where yields were least, but not where yields were greatest.
- Observation Spatial yield difference variability between hybrids existed at four of 15 site–year comparisons.
- Observation Spatial yield difference variability in response to N did not exist in the wet year on manured fields.
- Observation Soil NO3-N concentrations in the upper 30 cm were below 25 mg/kg on some manured fields in the wet year.
- Recommendation Variable N rate management of corn requires more information than soil NO3-N concentrations and yield maps.
- Recommendation Adoption of variable hybrid selection is unlikely when hybrids interact with sites but show no spatial yield difference variability within sites.