Claim · model-written summary
Two piecewise equations, a three-parameter power function and a five-parameter spline exponential function, provided good fits to Royal Gala apple fruit mass–diameter data.
- Taxon
- apple
Malus domesticae1 - Material
- Royal Galae1
- Outcome
- good fits to datae2
- Comparator
- a number of mass—diameter equationse1
Not reportedGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“A number of mass—diameter equations were compared for their potential use in indirect measurement of fruit masses of `Royal Gala' apple ( Malus × domestica )”
e2“Two such equations, a three-parameter piecewise power function and a five-parameter spline exponential function, provided good fits to data”
Title
H.N. De Silva; D.S. Tustin; W.M. Cashmore; et al. HortScience 1997. doi:10.21273/hortsci.32.7.1169
Other claims from this paper (7)
- Method / resource For both equations the estimated mean bias on individual fruit predictions was within 5% of predicted mass over the two validating data sets.
- Method / resource A sample of 20 fruit gave standard errors within 2.5% of mean predicted mass.
- Observation There was evidence of a seasonal difference in the estimated bias of the equations.
- Observation Seasonal differences in fruit shape could not be confirmed as the cause of the bias variation.
- Association The equations applied to data from other regions suggest that divergence from the estimated functional form may be greater under increasingly different climatic conditions.
- Recommendation Further investigation is needed before the proposed equations are applied across climatically different regions.
- Method / resource The precisions are adequate for industry requirements for monitoring fruit mass through the growing season.