Effects of the Preceding Crop on Soil N Availability, Biological Nitrogen Fixation, and Fresh Pod Yield of Organically Grown Faba Bean (Vicia faba L.)

In the current study, impact of preceding crops on growth, fresh pod yield, nitrogen fixation efficiency, and nutrition faba bean (Vicia L.) was investigated for two years in both organic conventional crops. As served cabbage, pea, bean. The number per plant (PN) total yield (TFPY) were significantly lower with cabbage compared to pea as cropping systems experimental years. However, farming system, increased PN TFPY a crop, while there no significant difference between legumes. greater performance legumes associated higher soil NO3-N total-N concentrations at beginning subsequent crop. N availability when crop legume resulted partly from biomass residues left by these field after harvest, cabbage. it also more extensive nodulation roots rhizobia percentage derived atmosphere (%Ndfa) their tissues, determined through natural abundance 15N isotope, legume. system had but %Ndfa