Claim · model-written summary
Riesling yields ranged from 5.2 to 12.4 t/ha in 2008 across crop levels.
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorDirectionQualifier
Verbatim
e0“Crop levels of 1 (low), 1.5 (medium), and 2 (high) clusters per shoot established by cluster thinning (CT) were compared to nonthinned (control) Riesling vines over a three-year period”
e1“Yields ranged from 5.2 to 12.4 t/ha in 2008”
Title
Cluster Thinning Reduces the Economic Sustainability of Riesling Production
Trent Preszler; Todd M. Schmit; Justine E. Vanden Heuvel American Journal of Enology and Viticulture 2013. doi:10.5344/ajev.2013.12123
Other claims from this paper (17)
- Observation Riesling yields ranged from 4.0 to 9.3 t/ha in 2009 across crop levels.
- Observation Crop load ranged from 2.9 to 8.7 in 2008 across crop levels.
- Observation Crop load ranged from 2.9 to 9.9 in 2009 across crop levels.
- Intervention effect By 2010, cluster thinning did not change yield or crop load relative to nonthinned control vines.
- Intervention effect Cluster thinning did not change cluster weight in 2008 and 2009.
- Intervention effect In 2010, control clusters weighed 39% less than low-crop clusters.
- Intervention effect Cluster thinning had little or no effect on berry size, pH and titratable acidity.
- Intervention effect Cluster thinning had little or no effect on pruning weight, cluster light exposure and bud cold hardiness.
- Observation Soluble solids at harvest ranged from 18.2 Brix in control to 22.3 Brix in low crop in 2008.
- Observation Soluble solids at harvest ranged from 18.9 to 22.1 Brix in 2009.
- Observation Soluble solids at harvest ranged from 20.5 to 22.0 Brix in 2010.
- Intervention effect In a consumer wine aroma sorting trial in 2008, low crop wine differed in aromatic attributes from the other treatments.
- Intervention effect In a consumer wine aroma sorting trial in 2009, low and medium crop wines differed in aromatic attributes from the other treatments.
- Observation Grower net return per hectare in 2008 ranged from $2,832 in low crop to $16,055 in control.
- Observation Grower net return per hectare in 2009 ranged from −$115 to $8,596.
- Observation Grower net return per hectare in 2010 ranged from $1,938 to $4,242.
- Observation Financial losses from cluster thinning could be recouped only by grape price increases of up to 143%.