Claim · model-written summary
Grain yields were not spatially consistent from year to year.
- Taxon
- corn
Zea mays subsp. mayst0 - Outcome
- spatially consistente3
- Qualifier
- from year to yeare3
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Corn Grain Yields”
e3“Grain yields were not spatially consistent from year to year”
Title
Spatial and Temporal Stability of Corn Grain Yields
J. A. Lamb; R. H. Dowdy; J. L. Anderson; et al. jpa 1997. doi:10.2134/jpa1997.0410
Other claims from this paper (7)
- Observation Poor production areas of corn were not found in similar locations each year.
- Observation Areas with better corn grain yields were not consistent from year to year.
- Observation Previous-year grain yields accounted for only 4 to 42% of the grain yield variability in a given year.
- Observation Grain yield maps from four previous years could only account for 46% of the 1995 grain yield variability.
- Observation Discarding the lowest and highest yielding years, 32% of the 1995 yield variability could be predicted from previous yields.
- Observation Grain yield variability can be substantial even in intensively managed fields believed to be uniform.
- Recommendation The authors conclude that site-specific yield-map fertilizer recommendations may not be possible without identifying causes of yield variability.