University of Tehran perss Journal of Crops Improvement 2008-8337 15 4 2013 12 22 Effect of N Fertilizer of Different Levels and Cultivated Density on Yield and Essential Oil Content on Moldavian Dragonhead Effect of N Fertilizer of Different Levels and Cultivated Density on Yield and Essential Oil Content on Moldavian Dragonhead 179 194 51375 10.22059/jci.2013.51375 FA Sophia Soroori MSc Student, Medical Plant and Spices, Beverage, Agriculture University, Islamic Azad University of Damghan, Damghan, Iran Mohammad Moghaddam Assistante Professor, Department of Horticulture, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran Hamid Hashemi Moghaddam Assistante Professor, Department of Chemistry, Faculty of Fundamental science, Islamic Azad University of Damghan, Damghan, Iran Journal Article 2013 07 09 <strong>A filed experiment was conducted to assay the effect of nitrogen fertilization and cultivated density on essential oil content on dragonhead (<em>Dracocephalum moldavica</em>) in semi-arid conditions in 100 km of South East of Mashhad. The experiment was done as factorial based on randomized complete blocks design with three replications, factor included four levels of nitrogen fertilization (0, 50, 100, 150 kg/ha) and three levels of cultivated density(20, 30, 40 cm). The results showed that the effect of nitrogen fertilization and cultivated densityhad significant effect on plant height, number of primary shoot, fresh and dry weight of plant, essential oil content and herbage yield of dragonhead. The highest plant height, number of primary shoot, fresh and dry weight of per plant was obtained from 40 cm cultivated densitywith 100kg/ha N treatment. The highest herbage yield (10.4 ton/ha), essential oil content (0.46 percent) and essential oil yield (44.9 kg/ha) obtained from 40 cm with 100kg/ha N treatment. In conclusion, application of 100 kg/ha N fertilizer with cultivated density40 cm can be recommended for the maximum of herbage and oil yield of dragonhead in this condition.</strong> <strong>A filed experiment was conducted to assay the effect of nitrogen fertilization and cultivated density on essential oil content on dragonhead (<em>Dracocephalum moldavica</em>) in semi-arid conditions in 100 km of South East of Mashhad. The experiment was done as factorial based on randomized complete blocks design with three replications, factor included four levels of nitrogen fertilization (0, 50, 100, 150 kg/ha) and three levels of cultivated density(20, 30, 40 cm). The results showed that the effect of nitrogen fertilization and cultivated densityhad significant effect on plant height, number of primary shoot, fresh and dry weight of plant, essential oil content and herbage yield of dragonhead. The highest plant height, number of primary shoot, fresh and dry weight of per plant was obtained from 40 cm cultivated densitywith 100kg/ha N treatment. The highest herbage yield (10.4 ton/ha), essential oil content (0.46 percent) and essential oil yield (44.9 kg/ha) obtained from 40 cm with 100kg/ha N treatment. In conclusion, application of 100 kg/ha N fertilizer with cultivated density40 cm can be recommended for the maximum of herbage and oil yield of dragonhead in this condition.</strong> https://jci.ut.ac.ir/article_51375_ff4883b5351203bc0934a40e8edc8278.pdf