Table 2.

Electrical potentials (EP) measured in daily irrigation (Average values of 7 plants)

	EP [mV]
Periods	25 cm*	85 cm*
Dawn 2:00–7:59	−89.99 c	−121.5287 d
Morning 8:00–13:59	−85.77 d	−116.4938 b
Afternoon 14:00–19:59	−79.71 a	−104.0548 a
Night 20:00–01:59	−88.67 b	−120.8095 c

Tukey Kramer (α = 0.05); *Micro electrodes inserted at 25 and 85 cm above the soil surface, respectively.