Nitrogen Deficiency of Grape
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Nitrogen deficiency symptoms include reduction in shoot growth, small or stunted leaves, and foliar chlorosis (yellowing) over the entire plant. Nitrogen deficiency is common in poor soils or where annual nitrogen applications are neglected.
Pale foliage due to nitrogen deficiency.
(Photo: John Strang, University of Kentucky)
Management:
- Monitor nitrogen levels through foliar analyses and apply nitrogen annually based on need.
- Avoid excess nitrogen, which leads to excessive growth and adds a “grassy” flavor to wine.
