grapegrowing
Patty Skinkis, Oregon State University
Nutrient deficiencies and toxicities can cause discoloration and deformation of vine leaves and shoots.
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toxicities. Nutrient deficiencies can be difficult to diagnose, especially if multiple nutrients are lacking. It is best to submit soil and
plant tissue for analysis at a reputable testing
lab and discuss the results with an extension
specialist in your area or your crop consultant prior to diagnosing a nutrient-related
disorder. An over-application of a fertilizer
is often easier to diagnose, as the grower
can review farm records with a professional
to determine if a product was improperly
applied. Also, soil tests may indicate other
underlying factors that may predispose the
vineyard to a nutrient imbalance.
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