RT Journal Article SR Electronic T1 Effect of Vineyard Locations, Varieties, and Rootstocks on the Juice Amino Acid Composition of Several Cultivars JF American Journal of Enology and Viticulture JO Am J Enol Vitic. FD American Society for Enology and Viticulture SP 135 OP 139 DO 10.5344/ajev.1989.40.2.135 VO 40 IS 2 A1 Huang, Z. A1 Ough, C. S. YR 1989 UL http://www.ajevonline.org/content/40/2/135.abstract AB Several grape varieties grown in Napa Valley and Davis and certain samples from other locations were analyzed for amino acids at the beginning of fermentation. Amino acid contents of two grape varieties grown on nine different rootstocks in the Santa Ynez Valley were analyzed for the effects of rootstock on the juice amino acid composition. Key grape amino acids prior to fermentation and at the end of fermentation were related to fermentation times of Chardonnay juices from two different locations.