Read the following statements and select the incorrect ones.
(i). The co-cordinated activites of the legume and Rhizobium bacteria depend on chemical interations between the symbiotic partners.
(ii). Leguminous roots secrete chemical attractants that attract Rhizobium bacteria living nearby.
(iii). N,P and K usually do not get dificint in soil due to their low plant requirement
(iv). Nitrogen cycle is regular circulation of nitrogen amongst oliving organisms with its reservoir pool in lithosphere and cycling pool in atmosphere.