A field experiment was conducted to study the effects of elements zinc (Zn), boron (B) and sulfur (S) and their interactions on quantitative and qualitative agronomic characteristics of rapeseed. Minimum grain oil and seed yield were obtained from control treatments and the highest seed yield were obtained from S + B + Zn treatments. The maximum of oleic acid (229.6 mg g -1 ) and linolenic acid (27.14 mg g -1 ) were obtained from B + Zn + S treatment. Maximum of linoleic acid (55.55 mg g -1 ) were obtained from B + Zn treatment. However, the highest superoxide dismutase activity was obtained from S + B + Zn treatments 10.24 unit mg -1 and the highest peroxidase activity were obtained from Zn treatment 0.87 µmol g -1 FM min. Regard to this experiment results, application of B, S and Zn fertilizers with NPK fertilizer can help to increase the yield and yield components in rapeseed. Also fatty acids composition of rapeseed are influenced by nutrients and since quality of edible oils depends on unsaturated fatty acids, especially linoleic and linolenic acids and these acids are essential fatty acids for the human body that must be supplied through diet. Therefore this research showed that we are not only able only to increase oil yield but also oil quality with desired fatty acid composition. Izveden je bil poljski poskus za preučevanje učinkov Zn, B in S ter njihovih interakcij na količinske in kakovostne agronomske lastnosti oljne ogrščice. Najmanjša pridelka zrnja in olja sta bila dobljena v kontrolnem obravnavanju in največja pri obravnavanju S + B + Zn. Največ oleinske (229.6 mg g -1 ) in linolenične kisline (27.14 mg g -1 ) je bilo pri obravnavanju B + Zn + S. Največ linolenične kisline (55.55 mg g -1 ) je bilo doseženo pri B + Zn obravnavi. Največja aktivnost superoksid dizmutase je bila pri S + B + Zn obravnavi (10.24 enot mg -1 ) in največja aktivnost peroksidaze pri obravnavi samo s cinkom (0.87 µmol g -1 FM min). Glede na rezultate raziskave sklepamo, da uporaba B, S in Zn gnojil s NPK gnojili lahko pomaga povečati pridelek in njegove dele pri oljni ogrščici. Gnojila vplivajo tudi na sestavo maščobnih kislin v olju, kar vpliva na kakovost jedilnega olja, ki je odvisna od vsebnosti nezasičenih maščobnih kislin, predvsem linoleične in linolenične, ki sta za človeka esencialni in jih mora dobiti s hrano.V tem pogledu je raziskava pokazala, da nismo sposobni le povečati pridelka olja ampak tudi dosegati željeno sestavo maščobnih kislin v njem.