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Summary: False flax (Camelina sativa L.), is an oil plant, of the Brassicaceae (Cruciferae) family. It is a rediscovered crop with multiple uses, it is a frost proof, low-soil and climatic conditions plant. In Poland the variety is not very widespread, despite of its health benefits. The particular value of camelina oil is given by its content in polyunsaturated fatty acid (50-60%), by its content in omega 3 (35-40%) and by its content in omega 6 (15-20%). The seeds are used for the extraction of oil (used in medicine or as bio fuel) or directly as animal feed. The research was carried out in the years 2012-2014 at the Experimental Station of Cultivar Assessment in Przecław, Poland. The summer Camelina sativa cv. ‘Omega’was used for the experiment. The studied factors were: A-plant density (200, 300, 400 pcs. m-2) and B-nitrogen fertilization (50, 100 kg∙ha-1). With the increase of the sowing density significantly increased plant density after emergence and before harvest, but reduced the number of silicles per plant. Increase in the rates of sowing from 200 to 400 pcs. m-2 decreased the 1000 seeds weight. Sowing 200 seeds m-2 compared to higher norms had significant effect on reduction the number of seeds in silicle, seed yield and the content of the seeds Fe, but resulted in an increase in the content of the seeds Mn and Zn. On the other hand, sowing 400 seeds m-2 caused a reduction the protein in the seeds, K, and Mg, and an increase fat yield and crude fat content in seeds. The higher nitrogen dose significantly increased the number of silicles per plant, total protein content, Fe, Zn in the seeds, seed yield, yield total protein and the percentage of linoleic and linolenic acids, while reduced the number of seeds per silicle, the crude fat content in seeds and the percentage of oleic acid.