What is the effect of soil water-holding capacity on concentration of sugar in grapevine berries?
Those soilswhich induce moderate water deficit are considered to be the best for grapevine cultivation. An early water deficit provokes early shoot growth cessation and reduces berry size. Under these conditions, berry sugar and anthocyanin concentrations are increased because of greater ripening speed. Total acidity is reduced, as berries contain less malic acid. Grape quality is high on the soils that induce water deficit, especially on clayey soils.