Irrigate before planting, on the 3rd day, then weekly; stop one week before harvest. FYM 25 t/ha and NPK 20:40:60 kg/ha as basal, and NPK 20:40:60 kg/ha again after 30 days. If 20 kg/ha Azospirillum is used, apply only two-thirds of the N.
Pending expert review
Source
Crop Production Guide – Horticulture Crops 2020 (Directorate of Horticulture and Plantation Crops, Tamil Nadu & Tamil Nadu Agricultural University (TNAU)), Sweetpotato – Irrigation; application of fertilizers, p. 138
