Effect of nitrogen and phosphorus levels on nodulation and yield components in faba bean (Vicia faba L.)

The objective of this research was to investigate different levels and the combined effect of nitrogen and phosphorus on the nodulation and yield components of faba bean (Vicia faba L.). A large seeded 584-066 accession numbered faba bean line, which was taken from a breeding program of the Field Crops Department, was used in the experiment. Four different nitrogen (0, 30, 60, 90 kg/ha) and three phosphorus (0, 40, 80 kg/ha) levels were applied to the soil at the sowing time. The number of pods/plant, biological and grain yield.per unit area, together with grain and plant N content, were increased by 60 kg/ha:nitrogen combined with-40 kg/ha phosphorus applications. The highest nodule and nodule weight/plant and 100 kernel weight were obtained from 80 kg/ha phosphorus and 30 kg/ha nitrogen combination.