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The data showed that 425 MHzelectromagnetic fields could improve the growth characteristics of mung beans and water convolvuluses. The effectiveness of the growth enhancement can be controlled by selecting appropriate exposure parameters (power and duration of exposure). The enhancement efficiency also depend on the plant variety and the exposure phase (prior- or post-germination): The data showed that growth enhancement is optimum for the mung beans at 100 mW/1 h power-duration level (prior germinationexposure), while for water convolvuluses the optimum growthpower-duration level was 1 mW/2 h. However, when both seed types were exposed at the early sprouting phase (i.e. 5-day-old) with their respective optimum power-duration levels for optimum growth (i.e. mung bean at 100 mW/1h and water convolvuluses at 1 mW/2 h), water convolvuluses showed growth enhancement while mung bean sprouts showed no effects. Water content analysis of the seeds suggested thermal effects only at higher field strength (10 W/4 h).