Figure 1From: Quantifying remobilization of pre-existing nitrogen from cuttings to new growth of woody plants using 15N at natural abundanceUnadjusted (open symbols) and adjusted (closed symbols) δ15N for new growth of the whole plant plotted against biomass for Populus balsamifera L. grown with either nitrate (A) or ammonium (B). Each data point represents a genotypic mean (N = 3). Correlation coefficients and P-values are placed near each line.Back to article page