Keosonthi, C.; Ingsuraruk, P.; Dangprapun, S.; Sookgul, P.; Narumol, P.; Saichompoo, U.; Malumpong, C. The boosting of anthocyanin accumulation in black rice cv. Riceberry by spraying MgSO4 at two different altitudes under field conditions. Int. J. Agric. Tech. 2022, 18, 1551-1566.