Foliar Weight and Area Related to Current Sapwood Area in Oak

An investigation of the relationship of total stem area, sapwood area, and current sapwood area (CSA) at dbh to foliar weight and area indicated that CSA consistently predicted foliar weight and area in black and white oak better than the other two measures. When a linear model was used to characterize the stem-foliar relationships, we found little difference between the ability of the three measures to predict foliar weight and area in black oak; however, CSA was the best of the three predictors in white oak. The use of a nonlinear model with each species improved the ability of CSA to predict foliar area. Forest Sci. 25:298-303.