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Un essai, implante en 1971, compare plusieurs densites de plantation (2 500 a 5 000 souches par ha) obtenues avec deux ecartements entre rangs (1 m - 2,60 m), trois espacements entre les souches (1,10 m - 1,25 m - 1,50 m), pour quatre cepages blancs. Deux methodes d'entretien du sol (non culture par desherbage chimique et enherbement permanent a 50 p. 100 de la surface) sont egalement etudiees. Dans le contexte ecogeopedologique de l'essai, les faibles densites de plantation augmentent significativement la vigueur et le rendement par souche, alors que la qualite de la vendange n'est pas alteree. L'enherbement permanent tout en ne modifiant pas le rendement, diminue la vigueur et l'acidite des mouts. +++ A field experiment, started in 1971, compares several planting densities of vineyards (2 500 to 5 000 vines by ha) achieved through two row spacements (1.8 m and 2.6 m) and three vine spacings (1.1 m, 1.25 m, 1.5 m) with four white groupe varieties. Two methods for soil maintenance, are also studied (clean cultivation by chemical weed control and permanent grass cover on 50 per cent of the aera). For the ecogeopedological context of this experiment, their is significant increasing of the vigour and the yield by wine for low planting densities, whereas the grape quality is not altered. Permanent ground cover lead to decrease the vigour and the must acidity, but not changes the yield.

Comparaison de différentes densités de plantation et méthodes de culture du sol (non culture et enherbement permanent)