Optimizing oil quantity and quality of camelina (Camelina sativaL.) with integrative application of chemical, nano and bio-fertilizers under supplementary irrigation and rainfed condition

•There are no reports on the separate and combined role of chitosan nanoparticles with bio-fertilizers in quantitative and qualitative evaluation of camelina oil.•Seed yield, oil content, and oil yield of camelina decreased in rainfed conditions, however, supplementary irrigation improved the mentioned traits.•The application of 50 % CF + BF + CS reduced the impact of drought and maintained higher growth and physio-chemical traits of the plants.•In rainfed conditions, combined application of BF + CS and in supplementary irrigation conditions, the application of 50 % CF + BF + CS significantly increased the quantity and quality of camelina.