Garlic is one of the crops widely cultivated in the world including Ethiopia. The inadequate application of inorganic fertilizer could be one of the constraints for garlic production. The field experiment was conducted in Debark district of North Western Ethiopia in 2019 under irrigation to investigate the effect of nitrogen and phosphorus fertilizer rates on growth, yield and yield component of garlic. The treatments consisted of a factorial combination of four levels of N (0, 52, 105 and 157 kg ha-1) and four P2O5 rates (0, 46, 92, and 138 kg ha-1), which were laid out in a randomized complete block design with three replications. Data were collected on growth, bulb yield and yield components of garlic, which were analyzed using SAS 9.4 software. The result showed that the main effect of N and P2O5 were significant on all tested parameters, while the interaction effect of N and P2O5 was significant on clove number per bulb, clove weight, harvest index, bulb yields (marketable, unmarketable and total). The maximum marketable bulb yield (15.30 t ha-1) was recorded at 157 kg N + 92 kg P2O5 ha-1, which was statistically similar with 138 kg P2O5 ha-1 + 105 or 157 kg N ha-1 (15.26 kg t ha-1) and 105 kg N + 92 kg P2O5 ha-1. These treatments increased marketable bulbyield by about 154% over the control.Therefore, application of 105 kg N + 92 kg P2O5 ha-1 can be recommended for garlic production in the study area.
