[en] The Appellations of Origin "Jerez-Xérès-Sherry" and "Manzanilla-Sanlúcar de Barrameda" occupy one of the oldest and most world renowned viticultural areas in the peninsula, but it is not exempt from the serious problems that are to be found throughout the sector. In order to try to adapt to the present situation, zoning plans are being promoted whereby priority is given to the quality of the product, sustainable development and the economic interests. This work undertakes an approach to the viticultural zoning. The nutritional state of the grapevines is studied by means of foliage analysis at veraison. The quality of production was measured by means of the berry weight and the analysis of the most usual variables of the must at the time of harvest (°Baumé, pH and titratable acidity) over five seasons, in the 21 plots where the soil profiles were opened for analysis. As a result of applying statistical analysis, the plots are grouped into five classes, two of which are subdivided. The most significant differences were established between the plots of class CL1, on Miocene limestone, and those of class CL5, on Pliocene-Quaternary sands and clays. Class CL1 presented the highest content of ash (mean ± sd CL1; CL5) (15.36 ± 1.73; 12.36 ± 1.77) and calcium (3.42 ± 0.90; 2.65 ± 0.72), the lowest berry weight (2.10 ± 0.30; 2.47 ± 0.50) and a greater Baumé degree (10.55 ± 0.86; 9.63 ± 0.98) than the CL5. This new approach takes other essential factors for the quality of the production into account such as the climate and the geomorphology (altitude, slope, and physiography).

[es] Las Denominaciones de Origen Jerez-X&eacute;r&egrave;s-Sherry y Manzanilla-Sanl&uacute;car de Barrameda ocupan una de las zonas de producci&oacute;n m&aacute;s antiguas de la pen&iacute;nsula y de mayor reconocimiento a nivel mundial, aunque no est&aacute;n exentas de la grave problem&aacute;tica por la que atraviesa el sector. Para intentar adaptarse a la situaci&oacute;n actual se est&aacute;n promoviendo planes de zonificaci&oacute;n en donde prima la calidad del producto, el desarrollo sostenible y los intereses econ&oacute;micos. En este trabajo se realiza una aproximaci&oacute;n a la zonificaci&oacute;n vit&iacute;cola. Para ello, se estudia el estado nutricional de las vides mediante el an&aacute;lisis foliar en el envero, la calidad de producci&oacute;n mediante el peso de los granos de uva y el an&aacute;lisis de las variables m&aacute;s usuales del mosto en la &eacute;poca de vendimia (&deg;Baum&eacute;, pH y acidez total) durante 5 campa&ntilde;as, en 21 parcelas coincidentes con la apertura de los perfiles. Como resultado de aplicar el an&aacute;lisis estad&iacute;stico, se han agrupado las parcelas en cinco clases, dos de ellas a su vez subdivididas. Las principales diferencias significativas se encontraron en las parcelas de las clases CL1, sobre albarizas del Mioceno, y las de la clase CL5, sobre arenas y arcillas del Plioceno-Cuaternario. La clase CL1 presenta el contenido m&aacute;s elevado de cenizas (mean &plusmn; sd CL1; CL5) (15,36 &plusmn; 1,73; 12,36 &plusmn; 1,77) y calcio (3,42 &plusmn; 0,90; 2,65 &plusmn; 0,72), el menor peso de grano de uva (2,10 &plusmn; 0,30; 2,47 &plusmn; 0,50) y un mayor grado Baum&eacute; (10,55 &plusmn; 0,86; 9,63 &plusmn; 0,98) que la CL5. Esta nueva aproximaci&oacute;n tiene en cuenta otros factores esenciales para la calidad de la producci&oacute;n como son el clima y la geomorfolog&iacute;a (altitud, pendiente, fisiograf&iacute;a).