Plant genotype × rhizobium strain interactions in white clover

In white clover plants grown and nodulated in a common soil environment the subsequent yield of vegetative propagates was generally greater when nodulated by rhizobium from the nodules of the parent or related plants than with that from unrelated plants. There were, however, exceptions to this, suggesting that clover productivity may be improved by selecting high coefnciency partnerships and sowing inoculated seed.