To ensure high and stable seed yields, in regions with semi humid climate, it is necessary to prevent the luxuriant growth of alfalfa plants and their subsequent lodging. The most effective method of controlling rank growth in alfalfa is cutting. Effect of cutting schedule on alfalfa seed yield was studied in four-year experiments (2001-2004). Four cutting schedules with variable dates of initial cutting were tested: first cutting for hay was carried out on May 5 (budding) in the c1 schedule, on May 15 (start of flowering) in the c2 schedule, on May 25 (full flowering) in the c3 schedule, and on May 5 and June 5 in the c4 schedule. Second regrowth was used for seed production in the c1-c3 schedules, and third regrowth in the c4 schedule. The study involved the seven most widely grown alfalfa cultivars in Serbia, six domestic and one French. The single late cut (c3 schedule) achieved the best balance among the yield components and thus the highest seed yield (468 kg/ha). Significant positive correlations were found between seed yield on one side and the number of fertile shoots per unit area and the number of pods per inflorescence on the other, r = 0.608 and r = 0.837, respectively.Da bi se osiguralo postizanje visokih i stabilnih prinosa semena potrebno je sprečiti suviše bujan rast i poleganje lucerke. Najefikasnija mera kojom se utiče na bujnost lucerke je kosidba useva. Takođe, kosidbom se određuje kalendarski rok početka i dužina trajanja faze cvetanja semenskog useva, kako bi se cvetanje podudarilo sa maksimalnom aktivnošću insekata oprašivača, što je od presudnog značaja za prinos semena lucerke. U cilju utvrđivanja komponenti prinosa, prinosa i kvaliteta semena lucerke u zavisnosti od sistema kosidbe semenskog useva izvršena su četvorogodišnja ispitivanja na Rimskim Šančevima. Ispitivana su četiri sistema kosidbe: rani sistem - kosidba krmnog otkosa 05. maja (u fazi butonizacije), srednje rani sistem - kosidba 15. maja (u fazi početka cvetanja), kasni sistem - kosidba 25. maja (u fazi punog cvetanja) i proizvodnja semena iz trećeg otkosa (kosidba 05. maja i 05. juna). Ispitivanje je izvršeno na sedam najrasprostranjenijih sorti lucerke u Srbiji, šest domaćih i jedna francuska
