Figure 3.

Effects of NaCl, CaCl₂, and MgCl₂ on root elongation. A factorial array of 27 solutions contained 80, 105, or 130 mm NaCl, 0.15, 0.30, or 0.45 mm CaCl₂, and 0, 1, or 2 mm MgCl₂ (all at pH 5.0). Areas of circles are proportional to [CaCl₂]. The data are from a single experiment representative of several similar but not identical Na⁺-Ca²⁺-Mg²⁺ experiments.