Impact of Foliar Nitrogen Supplementation on Chardonnay and Sauvignon Blanc Wines

The effectiveness of an application of foliar nitrogen at veraison depends on the initial level of vine nitrogen deficiency, an Agroscope study has shown. The threshold levels of assimilable nitrogen deficiency in the grape must are validated for Chardonnay but still need to be confirmed for Sauvignon Blanc.

Swiss Agricultural Research: Impact of Foliar Nitrogen Supplementation on Chardonnay and Sauvignon Blanc Wines