Effect of Plant Spacing and Np Fertilizer Levels on Growth, Seed Yield and Quality of Onion (Allium cepa L.) at Shewa Robit, Northern Ethiopia

Abstract

The highest seed yield per hectare (879.4 kg) and per plot (663.6 g) was obtained from 115 P2O5 & 114 N kg ha -1 fertilizers and plant spacing 10×30cm gives the highest seed yield per plot (561.7g) and per hectare (748.9 kg). The highest germination percentage was obtained by the interaction effect of 10×30 cm and 143.6 P2O5 & 142.5 N kg ha . Whereas, highest seed vigor index I and II were obtained from the interaction of 115 P2O5 &114 N kg ha -1 and 20×30×50 cm spacing.