Manipulating Nitrogen and Water Resources for Improved Cool Climate Vine to Wine Quality

Abstract: TLow yeast assimilable nitrogen (YAN) concentrations ( 140 mg/N/L) levels. Irrigation had no impact on YAN concentrations. Treatment influences on vine vegetative growth, yield, and grape and wine composition were marginal and inconsistent, and were largely influenced by climatic conditions. Cool-climate grape growers would benefit from applying more N in the vineyard around veraison to improve YAN, without stimulating vigor and negatively impacting chemical grape and wine composition. Increasing irrigation rates may be advantageous in seasons of high crop load, however current commercial irrigation rates are considered adequate.