Question

why is nitrogenous fertilizer not added in soil in which leguminous bacteria are grown

Answer 1

hello there your answer
nitrogenous fertilizer are not added in soil in which leguminous bacteria is grown because legumes natural fix nitrogen in soil for plants example Rhizobium is kept in field were huge amount of nitrogen is required Rhizobium fixes  Nitrgen through its root nodules in soil
hope it helps you.....

Answer 2

nitrogenous fertiliser is not added in leguminous plants' soil as they already have certain symbiotic micro organism in their roots which provide them nitrogen...and take shelter and nutrients