Glomus (fungi), earthworm, Oscillatoria are used in organic farming.

$(i)$ Glomus absorb phosphorus from soil and passes it to the plant

$(ii)$ Vermiculture and its application are now recognized as one of the best ways to restore soil health. Earthworms are now synonymus with organic farming.

$(iii)$ Oscillatoria fix atmospheric nitrogen and increase the organic matter of the soil