RT Journal Article SR Electronic T1 Shoot-Based Sampling of Vitis vinifera Clusters JF American Journal of Enology and Viticulture JO Am J Enol Vitic. FD American Society for Enology and Viticulture SP 55 OP 60 DO 10.5344/ajev.2008.59.1.55 VO 59 IS 1 A1 Michael E. Tarter A1 Sylvia E. Keuter YR 2008 UL http://www.ajevonline.org/content/59/1/55.abstract AB The weights of individual Cabernet Sauvignon, Merlot, and Chardonnay clusters were found to be significantly correlated with the numbers of clusters on the shoots from which each cluster grew. Based on this and other findings, a new sampling strategy was devised that used procedures that encompassed block-shape geometry and distributional characteristics of clusters grown on sampled shoots. The vine was chosen randomly, the vine shoot to be sampled was chosen systematically, and then each selected cluster was chosen randomly. This recommended composite random-with-systematic-sampling approach was motivated by the need to minimize biases attributable to subjective judgments made in the field, such as overselection of uncharacteristically large clusters.