This paper describes an effect of transient electromagnetic fields on the germination of seed plants. In our experiment, two kinds of transient electromagnetic fields by spark discharges were applied to seeds of radish, turnip and potherb mustard. In this experiment, the pulse widths of discharge current (800 A) were set to 3 µs and 15 µs, respectively. As a result, we found that the germination rates for the pulse width of 3 µs became greater than others (control [no application] and the pulse width of 15 µs) by around 14-20% especially when the temperature was low.
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