Abstract
This research was conducted to investigate the effects of different nitrogen doses on the seed yield and some agricultural characteristics of phaselia (Phacelia tanacetifolia Bentham.) under Isparta ecological conditions in 2017 and 2018 years. This research was conducted in randomized block design with three replication. Five different nitrogen doses doses (0, 40, 80, 120 and 160 kg N ha-1) were used in the study. Plant height, first flowering time, 50% flowering time, number of raceme per plant, number of flower per raceme, 1000 seed weight and seed yield were investigated in this research. According to the results of the research, nitrogen doses had a significant effect on all properties. Nitrogen applications increased plant height, beginning of flowering period, 50% flowering, number of raceme per plant, number of flower per raceme, 1000 seed weight and seed yield. According to the two-year average results, in the province of Isparta and similar conditions, it is necessary to apply 120 and 160 kg nitrogen to obtain high seed yield in phaselia.