Table 3.

F-test and means test for stomatal conductance (gs) (mol (H₂O) m⁻² s⁻¹), transpiration (E) (mmol (H₂O) m⁻² s⁻¹), and instantaneous water use efficiency (WUEi) [(µmol (CO₂) m⁻² s⁻¹) (mmol (H₂O) m⁻² s⁻¹)⁻¹] of traditional varieties of cowpea subjected to salinity levels of irrigation water.

F-Test
Sources of Variation	gs		E		WUEi
Block	0.000		0.000		0.000
Salinity	0.031		0.000		0.000
Varieties	0.000		0.000		0.000
Salinity × Varieties	0.000		0.000		0.000
Means comparison test (Standard Deviation, n = 5)
Varieties	gs		E		WUEi
	0.5 dS m−1	4.5 dS m−1	0.5 dS m−1	4.5 dS m−1	0.5 dS m−1	4.5 dS m−1
V1—Boquinha	0.21 ± 0.016 Aa	0.11 ± 0.004 Be	4.32 ± 0.19 Aa	1.98 ± 0.07 Be	3.94 ± 0.11 Bb	5.12 ± 0.38 Af
V2—Ceará	0.09 ± 0.001 Be	0.18 ± 0.006 Ab	2.47 ± 0.03 Bf	3.49 ± 0.11 Ab	3.30 ± 0.07 Ac	3.29 ± 0.19 Ah
V3—Costela de Vaca	0.14 ± 0.001 Ac	0.13 ± 0.004 Ac	3.48 ± 0.02 Ac	1.84 ± 0.04 Be	4.33 ± 0.12 Ba	8.22 ± 0.15 Ab
V4—Lisão	0.14 ± 0.002 Ac	0.14 ± 0.005 Ac	3.77 ± 0.03 Ab	2.57 ± 0.05 Bc	3.12 ± 0.03 Bc	4.78 ± 0.14 Af
V5—Canário	0.06 ± 0.002 Bg	0.11 ± 0.002 Ae	1.69 ± 0.07 Bh	2.47 ± 0.01 Ad	4.37 ± 0.23 Aa	4.51 ± 0.08 Ag
V6—Pingo de Ouro	0.08 ± 0.007 Bf	0.13 ± 0.001 Ac	2.28 ± 0.14 Ag	1.74 ± 0.01 Be	3.66 ± 0.12 Bb	7.50 ± 0.14 Ac
V7—Roxão	0.13 ± 0.007 Ac	0.09 ± 0.006 Bf	3.22 ± 0.12 Ad	1.64 ± 0.06 Bf	3.61 ± 0.11 Bb	5.96 ± 0.29 Ae
V8—Feijão Branco	0.15 ± 0.006 Ab	0.09 ± 0.004 Bf	3.83 ± 0.11 Ab	2.40 ± 0.09 Bd	2.82 ± 0.07 Bd	3.35 ± 0.14 Ah
V9—Canapu Branco	0.16 ± 0.006 Ab	0.11 ± 0.002 Be	3.63 ± 0.10 Ac	1.64 ± 0.02 Bf	2.74 ± 0.06 Bd	6.83 ± 0.28 Ad
V10—Canapu Miúdo	0.10 ± 0.002 Ae	0.03 ± 0.004 Bg	2.59 ± 0.02 Af	0.89 ± 0.09 Bg	4.05 ± 0.13 Aa	3.11 ± 0.20 Bh
V11—Ovo de Peru	0.12 ± 0.002 Ad	0.08 ± 0.002 Bf	2.83 ± 0.04 Ae	1.80 ± 0.02 Be	2.95 ± 0.04 Bd	4.45 ± 0.13 Ag
V12—Baeta	0.10 ± 0.007 Ae	0.11 ± 0.002 Ae	2.86 ± 0.17 Ae	1.44 ± 0.02 Bf	3.28 ± 0.15 Bc	9.44 ± 0.20 Aa
V13—Coruja	0.11 ± 0.002 Ad	0.09 ± 0.004 Bf	2.87 ± 0.05 Ae	2.42 ± 0.11 Bd	4.18 ± 0.08 Aa	3.17 ± 0.07 Bh
V14—Paulistinha	0.13 ± 0.007 Ac	0.12 ± 0.002 Bd	3.32 ± 0.13 Ad	2.69 ± 0.04 Bc	3.34 ± 0.06 Ac	3.58 ± 0.12 Ah
V15—Sempre Verde	0.14 ± 0.006 Bc	0.26 ± 0.005 Aa	3.37 ± 0.08 Bd	4.02 ± 0.05 Aa	3.36 ± 0.08 Bc	4.24 ± 0.04 Ag

Equal uppercase letters in the rows and lowercase letters in the column do not differ by Student’s t-test and Scott–Knott test at 5% probability level, respectively.