Leaf Area Estimation of Concord Grape Leaves from Simple Linear Measurements

Abstract

Simple linear measurements of Concord grape leaves were tested for suitability as predictors of actual leaf area. True leaf areas were determined using a Li-Cor^TM leaf area meter and were examined for correlations of linear measurements of leaves and combinations of those measurements. Linear measurements were strongly correlated with actual leaf areas. Both a one- and a two-variable model were found suitable for estimating Concord leaf area: Area = -3.01 + 0.85 (W x L) (R² = 0.9841) or Area = -1.41 + 0.527(W²) + 0.254(L²) (R² = 0.9884) where W = maximum leaf width and L = length of the leaf midvein.