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VENSource Research
Nitrogen and potassium fertilization effects on anthocyanin content and color of Tempranillo grapes
Does too much or too little fertilization affect grape color? These Spanish authors study this topic on Tempranillo.
The first page of the full article is available at: http://www.vigne-vin.com/VVPI_Site/webpagesFR/r_main/pdf/4033.pdf
86nitrogen and potassium fertilization and grape color .pdf