José Mª Martínez Vidaurre has obtained the PhD degree thanks to his thesis about the influence of the type of soil in the Tempranillo grape. The author has studied the influence of the type of soil and climate on the development of the vine and on the composition of the Tempranillo variety grape must and wine in 17 vineyard plots from Uruñuela, Rioja Alta. The results confirm the need to characterize the vineyard soils to evaluate the different productions and wine qualities that can be found in the DOCa Rioja.
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