Nutrient Management Effects on Wine Grape Tissue Nutrient Content.

With limited research supporting local nutrient management decisions in North Carolina grape () production, field studies (2015-17) were conducted to evaluate late season foliar nitrogen (N) application on leaf and petiole N concentration and yeast assimilable N (YAN) in the fruit. Foliar urea (1% ) was applied at different rates and application times beginning pre-and post-veraison. Compared to soil applied N, late season foliar N substantially enhanced petiole N and grape YAN.