Open Access Research Paper Views (404) Download (17) The effect of plant density on quantitative characteristics, optical extinction coefficient, and some physiological traits of faba bean cultivars Nazli. Derogar, Mani. Mojaddam J. Bio. Env. Sci.5( 1), 267-274, July 2014. Key: DensityFaba beanGrain yieldHarvest indexOptical extinction coefficientVarieties Details