Claim · model-written summary
Single-berry sampling yielded comparable mean sugar estimates.
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentSettingDirectionValueQualifier
Verbatim
e0“Single berry sampling gave comparable estimates of the mean sugar content”
t0“Grape”
Title
Studies on Grape Variability and Field Sampling
B. C. Rankine; K. M. Cellier; E. W. Boehm American Journal of Enology and Viticulture 1962. doi:10.5344/ajev.1962.13.2.58
Other claims from this paper (12)
- Observation Composition varied more between vines than between clusters within vines.
- Association Cluster position and weight had only a small effect on composition.
- Association Mean sugar content per vine was inversely correlated with vine yield.
- Association Mean acid content was directly proportional to yield.
- Association Both between-vine and within-vine acid variance components were highly correlated with mean acid level.
- Association Mean sugar content correlated with between-cluster variance, but not between-vine variance.
- Intervention effect Irrigated grapes were more variable than non-irrigated grapes below 20 per cent sugar.
- Method / resource One cluster per vine was the most efficient plot sampling method.
- Method / resource Sugar mean standard error in 200-vine plots was ± 0.25 per cent with either reported cluster sampling scheme.
- Recommendation Single-berry sampling is recommended for maturity assessment because it uses less fruit.
- Method / resource Cluster samples gave mean sugar estimates that compared well with the whole crop.
- Method / resource Equal numbers of clusters or berries per vine produced biased sugar and acid estimates.