1. Nectar secretion in alfalfa in relation to honeybee visitation and seed production was studied at Logan, Utah, from 1946 to 1951. Clonally replicated representative selections of "alfalfa conference" breeding stocks were planted in replicated randomized blocks in field and greenhouse. 2. Honeybee visitation was associated with nectar production per plant on field-grown plants (r = +.566**) and on greenhouse-grown material (r = +.693**). Nectar production and seed production were also correlated (r = +.580*). On the basis of the nectar per flower the correlation with bee visitors was +.024 and with seed was +.432; neither was significant. On the average a plant produced about 11,000 flowers and 6.6 gm. of nectar sugar. 3. Seed production and bee visitation were positively correlated regardless of whether the pollinators were restricted to nectar collectors (r = +.887**) or whether conditions were natural (r = +.652**). The relationship is independent of the effects of plants and replications as indicated by error-line correlation coefficients of +.394** and +.530** for natural pollination and nectar-collector pollination, respectively. Adjustment of seed yields to uniform bee visitation did not account for all the variation, since the seed yields were still significantly different after adjustment. An inherent difference in the response of the plants to bee visitation is indicated. 4. Average seed production per plant was 17.2 gm. with a range from 8.8 to 44.8 gm. The 400% range suggests a good possibility of improvement by breeding for this character. 5. Preliminary progeny tests for nectar production per flower were conducted, using polycross progenies and selfs and crosses involving high and low nectar producers. Average values for twenty-four-plant polycross progenies for nectar volume were positively correlated with nectar production of their maternal parents in the previous year where the nectar per flower was considered (r = +.833**). A range of 0.06-2.93 mg. of sugar per flower was obtained for individual plants in the progenies. 6. Average values of the reciprocal crosses of a high and a low nectar producer were 0.81 and 0.82 mg. of sugar per flower, but only two plants were available on one side of the cross. Multifactorial inheritance was postulated on the basis of the normal frequency distributions obtained. 7. Self-pollination of a low nectar producer gave low-producing progeny. Self-pollination of a high nectar producer gave high-producing progeny. A difference of 0.71 mg. of sugar per flower between the parents of a high and of a low nectar producer was reduced to 0.51 in the selfed progenies. Crossing a high nectar producer with a low nectar producer gave a progeny that was intermediate. Two crosses involving a high nectar producer with two high seed-producing clones were made. The average difference of the parents in the two crosses was 0.07 mg., and the average difference of the progenies was 0.10 mg. of sugar per flower. The parental advantage was maintained in the progeny.