MALABASARI, T. A.BADALINGANNANAVAR, SHANMUKHAPPA2019-01-222019-01-222015-06http://krishikosh.egranth.ac.in/handle/1/5810091950The investigation was undertaken at Agricultural Research Station, Bagalkote, University of Agricultural Sciences, Dharwad during summer season 2014-15 to study the nutrient management and population density on seed yield and quality of sunflower hybrid DSFH-3. Application of RDF (60:75:60 NPK kg/ha + 8 t/ha FYM) along with 30 kg N recorded higher plant height (33.26, 141.61 and 142.82 cm) at 30, 60 DAS and at harvest, respectively over application of FYM 8 t per ha without NPK. Similar trend was also noticed in number of leaves where higher number of leaves were noticed with the application of RDF (60:75:60 NPK kg/ha + 8 t/ha FYM) along with 30 kg N. The application of 30 kg N along with RDF recorded higher capitulum diameter (12.43 cm), volume weight (47.01 g), processed seed yield (1180 kg/ha) and 100 seed weight (4.73 g) over application of FYM 8 t per ha without NPK. Significantly higher seed quality parameters like seed germination (95.16%), vigour index (3667), root length (18.61 cm), shoot length (19.90 cm) and seedling dry weight (0.31 g) were recorded with application of RDF + 30 kg N over application of FYM 8 t per ha without NPK. Application of RDF (60:75:60 NPK kg/ha + 8 t/ha FYM) + 30 kg N and with a spacing of 60 x 45 cm is more effective in increasing the hybrid seed yield during sunflower hybrid seed production of DSFH-3. Application of RDF (60:75:60 NPK kg/ha + 8 t/ha FYM) + 30 kg N and with a spacing of 60 x 45 cm recorded higher net returns (Rs. 327705) and B:C ratio (6.8) compared to other treatments.ennullThesis