Answer Posted / s.krishnasamy

biofertilizers make up by many algal plant and angiosperm
and some decay leaves contain organic mater. It is
decomposed. to useful compound by some earth worm . and also
symbiotic association with azolla anabena the are fix the
nitrogen in earth and gives the nitrogen to the host plant.

disadvantages for that compost more number of cost

time is takes

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