Figure 2.

Changes during the six labeling experiments in dry matter (mg plant⁻¹) represented on the left axis and N content (mg plant⁻¹) represented on the right axis of pea seeds (A) and vegetative plant parts (B) further separated into pods walls (C), leaves (D), stems (E), and roots (F). Time was expressed in cumulative degree days after sowing. Data are means and vertical bars indicate ±se for n = 3 repetitions of each of two plants.