To pre-treat the seeds with a static magnetic field (SMF), we used an electromagnet (AETec), fabricated by the Academy of Embedded Technology in Delhi, India. The pole components measured 16 cm in length and 9 cm in diameter while the coil consisted of 3000 turns and a resistance of 16 Ohms. Nearly 100 dry seeds of soybean at a time were placed in a cylindrical sample holder made of thin transparent plastic between the two poles of the electromagnet for magnetopriming, while maintaining the temperature at 25 ± 1 °C. The distance between the two poles was 5cm. The SMF was developed using a direct current (DC) power supply (80 V/10 A) with a continuously changing output. Based on previous studies, soybean seeds were treated with 200 mT of SMF for an hour (Kataria et al. 2020 (link)). The SMF strength was obtained by adjusting the current and voltage by power supply and the obtained SMF strength was measured using a digital gauss meter (AETech model DGM-102) with a probe consisting of an indium arsenide crystal encapsulated by a 5×4×1 mm non-magnetic sheet. The local geomagnetic field was less than 10 mT in the north to south direction. With the exception of the SMF treatment (200 mT for 1 hour) for primed seeds, all other conditions were the same for unprimed and magnetoprimed seeds. Every experiment was carried out concurrently with unprimed seeds (which were used as controls) stored at room temperature (25 ± 1 °C) and kept away from the magnetic field (less than 5 mT).