## 4 Discussion  
Previous studies have shown positive effects of magnetic and electromagnetic fields on germination, root length, dry matter, vigour, and yield [22; 23; 24]. Currently, however, most studies have reported the effect of very low magnetic fields close to the Earth's magnetic field of around 5 \(\mu\)T [22] or slightly higher magnetic fields around 200 mT [22; 23; 24; 25]. Currently, few results have been presented for magnetic and electromagnetic fields with much higher inductions of 1 T, 10 T, and 15 T [26; 27; 28]. Previous research results have indicated that high germination capacity and long root length lead to high dry matter (high amount of tissue in the plant). This may lead to a higher yield [29]. [PERSON] et al. [30] treated the radish (_Raphanus sativus_ L.) with the magnetic field of 20 mT for 10, 30, and 60 min, and proved a positive effect of MF on seed energy, seedlings' length, and fresh weight, particularly for 60 min of exposure time. [PERSON] et al. [11] magnetised seeds of sunflower (_Helianthus annuus_ L.) in magnetic fields of 50, 100, and 150 mT for 5, 10, and 15 min. They observed the increase in final germination, germination energy, root length, and shoot length. [PERSON] et al. [31] reported the effect of pre-sowing magnetic field treatment on germination, above-ground parts, and roots of Faba Bean (_Vicia faba_ L. spp. _Minor_). They used MFs of 30 and 85 mT for 15 s. Both MF doses had a positive effect on germination. Seven days after sowing, increases in root length (25.5% for 30 mT and 43.1% for 85 mT) and the stem length (28.1% for 30 mT and 52.3% for 85 mT) were observed.  
However, our study shows that a low electromagnetic field with an induction of 200 mT and magnetisation times of 15 min and 60 min does not increase the germination capacity of the cucumber, and significantly decreases the root length and the amount of dry matter. Further results showed, however, that a higher electromagnetic field with an induction of 1 T and a time of 60 min allows a slight acceleration of germination capacity, does not affect root length but significantly increases the amount of dry matter (by 43%) compared to the control sample. This indicates that germination capacity and root length are not always correlated with the amount of dry matter. The significantly poorer results obtained for electromagnetic fields of 1 T induction and 15 min compared to the control sample indicate that cucumber seeds require a higher-energy dose and a longer magnetisation time. Further results obtained for electromagnetic fields of 9 T induction and magnetisation times of 15 min and 60 min show a significant reduction in germination rate and root length and a significant increase in dry weight by about 45% compared to the control sample. The above results indicate that there is not always a correlation between germination rate, root length, and dry matter. This finding is very important and requires further research to identify the dominant electromagnetic field factor that influences the increase in dry matter. The results presented by [PERSON] et al. [28] suggest that the 9 T magnetic field does not affect the genome, because a change in the genome only occurs at fields above 15 T.  
Because the magnetisation process was carried out for dry seeds and not for seedlings, this can indicate that the influence of electromagnetic field may relate more to physical properties, e.g., diamagnetism, paramagnetism, and ferromagnetism, which affect the acceleration of plant tissue growth processes (dry matter). Of course, one cannot exclude the influence of other factors on the dry matter growth process such as biological, chemical, biochemical processes, modification of cell structure, and directed movement of substances as a result of magnetic field [22].