“…New Zealand soils are naturally devoid of Rhizobium meliloii (Blair and Bennett, 1960;Leamy et ai., 1974) and when introduced, they generally do not persist in the soil in the absence of the host plant (Greenwood, 1964). Consequently, inoculation of luceme seed at each sowing to obtain nodulation is a necessity (Mackinnon et at., 1977). In New Zealand, the Inoculant and Coated Seed Testing Service (ICSTS) provides manufacturers with recommended strains of Rhizobium and sets standards of purity, strain identity and number of rhizobia for commercial inoculants (Johnson, 1979(Johnson, , 1984.…”