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Optimum nitrogen fertilization from the right source is the most important production factors for higher grain yield of wheat. Study to investigate the effect of type and rate of Nitrogen fertilizer on yield of bread Wheat was conducted in Ofla and Endamehoni districts of northern Ethiopia in 2017 and 2018 main cropping season. The treatments consists four levels of different sources of nitrogen fertilizer (Prilled urea, granular urea, urea super granule and UREAstabil) each with three application rates (46, 69 and 92 kg N ha−1) and one control (without any N fertilizer application) laid down in a randomized complete block design replicated three times. Grain yield of was affected significantly to the application rates and source of nitrogen fertilizer at Adigolo and Mekan districts of Ofla and Endamehoni respectively. The highest grain yield of 5.11 and 4.08 tha-1 was obtained from application 92 and 69 kg N ha-1 of UREAstabil at Adigolo and Mekan districts respectively. In both Adigolo and Mekan districts, grain yield of wheat showed that a linear increase with increasing rate of N fertilize while, application of 46 kg N ha-1 from UREAstabil reaches optimum agronomicaly and economically for the study areas. Key words: Prilled urea, super granular urea, granular urea, UREAstabil.

Advanced breeding lines with acceptable resistance and tolerance levels to broomrape is an important way of decreasing yield loss. The objective of this research was to assess the yield stability of faba bean genotypes under diverse broomrape (Orobanche crenata) prone production environments. Six faba bean genotypes were tested across six environments. The AMMI analysis showed significant (P