Claim · model-written summary
The spatial pattern of simulated mean bias error of raw yields was largely unresponsive to soil texture.
- Treatment
- soil texturee2
- Outcome
- spatial patterns of simulated mean bias error (mbe) of raw yieldse2
- Direction
- no_changeinferrede2
Zea maysNot reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“used to simulate maize yield in a 13-state region of the U.S. Corn Belt”
e2“The spatial patterns of simulated mean bias error (mbe) of raw yields were largely unresponsive to variations in soil texture, optimum hybrid choices, and planting dates typical for the region”
Title
Christopher J. Kucharik Earth Interactions 2003. doi:10.1175/1087-3562(2003)007<0001:eoapam>2.0.co;2
Other claims from this paper (14)
- Method / resource Simulated 15-year mean maize yields had a significant bias higher than observations, with a mean bias error of 0.97 Mg ha−1.
- Method / resource Simulated 15-year mean maize yields had a root-mean-squared error of 1.75 Mg ha−1.
- Association The spatial pattern of simulated mean bias error of raw yields was largely unresponsive to optimum hybrid choices.
- Association The spatial pattern of simulated mean bias error of raw yields was largely unresponsive to planting dates.
- Association Simulated interannual maize yield variability showed a relatively weak response to changes in soil type.
- Association Simulated interannual maize yield variability was more responsive to planting date than to hybrid selection.
- Method / resource The correlation between observed and simulated yield residuals within 0.5° grid cells ranged from 0.0 to 0.6.
- Association The correlation between observed and simulated yield residuals increased as additional land management scenarios were included within grid cells.
- Association The correlations between observed and simulated yield residuals had a weak but significant relationship to reported harvested area (r2 = 0.36).
- Method / resource Simulated positive yield residuals averaged 18% over the region, compared with 13% for observations, so simulated interannual variability was larger than observed.
- Method / resource Simulated negative yield residuals averaged −21% over the region, compared with −17% for observations, so simulated interannual variability was larger than observed.
- Recommendation The impact of irrigation on maize yield in the western Great Plains must be accounted for in future modeling scenarios.
- Intervention effect Irrigation increased mean maize yields by 36% compared with rain-fed maize in the western Great Plains.
- Intervention effect Irrigation significantly decreased interannual maize yield variability compared with rain-fed maize in the western Great Plains.