Experimental boxes maintained at about 21.5°C and the experiments were performed in the dark.
Petri dishes were placed at the center between the coils and exposed under normal conditions or under PEG stress (drought environment conditions) which was simulated by watering the seedlings with polyethylene glycol (PEG) at 88 g/L and 176 g/L.
The axis of the coil was in east west direction in which the geomagnetic field was equal to zero. The coils were placed in a paper box shielded by grounded aluminum foil. The control group was exposed to equal composition and treatment, except that it was not exposed to magnetic fieldstimulation. The controls were performed by placing the seeds in the non-energized coils as well as placing them in control box which was located at a distance of 3.5 m from the coils. One control was preformed with PEG 88 g/L and the other two under normal conditions. In one experiment (PEG 176 g/L) subgroups were introduced, one group was exposed for 4 days and then placed into the control box for the remaining 3 days and the second group was first placed into the control box and then exposed to MF for the last 3 days.