Effect of rootstock on soluble solids (SS), titratable acidity (TA), pH, and berry weight at harvest on Chardonnay, Merlot, and Syrah over three vintages (2007–2009). Effect of rootstock on soluble solids (SS), titratable acidity (TA), pH, and berry weight at harvest on Chardonnay, Merlot, and Syrah over three vintages (2007–2009). Means are presented with standard error. James F. Harbertson, and Markus Keller Am. J. Enol. Vitic. 2012;63:40-48 © 2012 by the American Society for Enology and Viticulture