Table III.

Effects of pH and Ca²⁺ on root elongation in cv Scout 66 seedlings

RL_max = 68.5 mm and RL_S = 23.2 mm. A₁ = 1/exp[(a₃/(a₄{Ca²⁺}₀ + 1){T}₀)^{b₁], A2} = 1 − 1/exp[(a₂{Ca²⁺}₀^{b₂], and computed RRL_max = 100 A1} · A₂. The data are from an experiment performed twice. The coefficients for the computation of RRL_max are based on 117 measurements (see Table II).

pH	CaCl2	Measured RRLmax	A1	A2	Computed RRLmax
	μm
3.6	200	8	0.00	0.70	0
3.9	200	8	0.00	0.84	0
4.2	200	30	0.17	0.94	16
4.5	200	90	0.82	0.98	81
4.8	200	100	0.99	0.99	99
3.6	400	4	0.00	0.78	0
3.9	400	0	0.01	0.90	1
4.2	400	58	0.48	0.97	46
4.5	400	93	0.95	0.99	94
4.8	400	86	1.00	1.00	100
3.6	800	4	0.00	0.86	0
3.9	800	16	0.08	0.94	8
4.2	800	77	0.78	0.98	77
4.5	800	100	0.99	0.99	98
4.8	800	88	1.00	1.00	100