They concluded that the greatest tuber yield and N use efficiency were achieved at a N rate of 150-180 kg ha SP -1 sp with 2-3 splits, a fertilization depth of 15-25 cm, and a planting date of 25 April to 10 May. Yuan et al. [[5]] conducted a long-term field experiment to investigate the effects of crop rotation and biochar-based fertilizer application on the crop yield, soil attribute, crop quality, and agronomic traits in 2014-2020.