RT Journal Article SR Electronic T1 Wine Grape Production Studies in Washington JF American Journal of Enology and Viticulture JO Am J Enol Vitic. FD American Society for Enology and Viticulture SP 18 OP 25 DO 10.5344/ajev.1972.23.1.18 VO 23 IS 1 A1 W. J. Clore A1 C. W. Nagel A1 G. H. Carter A1 V. P. Brummund A1 R. D. Fay YR 1972 UL http://www.ajevonline.org/content/23/1/18.abstract AB The grape varieties `Chardonnay', `White Riesling', `Chenin blanc', `Semillon', `Seibel 10868', `Cabernet Sauvignon', `Pinot noir', `Gamay Beaujolais', `Meunier', and `Foch' were planted in 1965 at Prosser for production and winemaking studies. The climate, defined in terms of heat units for the growing season (April-October) 1967 through 1970, averaged 2437 degree-days. The average frost-free period was 170 days, and the lowest temperature in these years was -ll°F. All varieties had good to very good yields, with favorable levels of sugar and acid. Four varieties averaged high in total acidity. Most unprotected varieties sustained some bud injury from low 1968-69 winter temperatures, but yields in 1969 were normal.