To determine the Impact of Fertility Levels on Barley (Hordeum vulgare L.) Varieties' Growth and Yield in Uttar Pradesh's Central Plain Zone, a field experiment was carried out at the agricultural farm of Rama University, Kanpur, during the rabi seasons of 2023–2024.The treatment included three fertility levels (F1 (N, P2O5& K2O)- 40;20;20, F2 -60;30;30, and F3- 80;40;40) assessed in a split plot design (SPD), and nine combinations of three varieties (V1-Haritma (K-560), V2-Narmada (K-603), and V3-Lakhan (K-226)).Whereas 'Lakhan' (26.43 q/ha) generated lower grain yield, 'Haritma' (29.51 q/ha) and 'Narmada' (29.40 q/ha) were comparable. The highest grain yield (31.22 q/ha) among fertility levels was achieved by N-80, P-40, and K-40, followed by N-60, P-30, and K-30 (29.27 q/ha), and the lowest yield was recorded by N-40, P-20, and K-20 (24.85 q/ha).