Rhizobium Inoculation and Chemical Fertilisation Improve Faba Bean Yield and Yield Components in Northwestern Ethiopia

The productivity of the faba bean has declined in Ethiopia, owing to poor management practices, such as blanket fertilisation. In 2018, a field experiment was conducted Nitisol soil during main cropping season Northwestern determine amount chemical fertiliser and Rhizobium inoculant be used for optimum yield within economic feasibility. consisted factorial combination five rates blended NPSZnB (0, 60, 121, 180 240 kg ha?1) three 500 750 g ha?1). Sole fertilisation, well inoculation, individually produced seed 2.3–2.5 t ha?1, about 1.0–1.2 ha?1 more than control. However, maximum (3.3 recorded from combined application both inoculant. correlated closely with number active nodules (R2 = 0.78 **), suggesting substantial contribution symbiotic N2 fixation. Inoculation increased N content by at least 30 ha?1. Chemical containing 44 mineral does not appear have an adverse effect on use inoculant, producing net profit 72,918 birr (EUR 2232), is recommended study area. This emphasises that (1) inoculation alone can produce much rate but (2) fertiliser, promoting vigour