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Foi estudada a relação entre a área foliar (AF) e a largura da folha (L) em videira do cultivar Niagara Rosada. A área foliar pode ser estimada pelo uso de um coeficiente que corrige a área do círculo, considerando seu diâmetro igual à largura da folha, mediante a fórmula: AF = 0,85 pi (L/2)². Width of leaf blade was closely correlated with leaf area in leaves of grapes cv. Niagara Rosada. It was found that the shape of any leaf was similar to a circle. A short-cut procedure for estimating easily, rapidly and precisely the leaf area was developed. The equation relating leaf area (AF) to width of leaf blade (L) was: AF = 0.85 pi (L/2)²

Determinação da área foliar em videira cultivar Niagara Rosada