Survival of Rhizobium trifolii on seeds of arrowleaf clover (Trifolium versiculosum Savi) and subclover (Trifolium subterraneum L.) was affected by the maturity of peat-, vermiculite-, and charcoal-based inoculants. Ten times more rhizobia survived on seed 4 days after inoculation when inoculants were stored (cured) before being utilized as compared with uncured inoculants. Increasing the curing time of inoculants beyond 4 weeks had little effect on increasing survival of seed-applied rhizobia.
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Materon et al. (1985) studied this question.
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