The aim of this present study was to investigate the impact of different seeding rate and nitrogen fertilizing levels on the seed yield and feed value of oats(Avena sativa L.) grown in Gyeongbuk area for two years. The experiment was arranged in split plot design with 3 main plots(100, 130 and 160 kg of seed/ha) and 4 subplots(0, 50, 70 and 90 kg N/ha), with 3 replicates. Heading, flowering, and maturing dates of oats sown in spring 2017, delayed by two days compared to that of spring 2016, and the plant height of spring 2017 were significantly shorter than that of spring 2016(18.1 ~ 23.4 cm). In addition, the highest number of stems and number of panicles according to different seeding rate and nitrogen fertilizing levels were achieved with the seeding rate of 160 kg/ha and 90 kg of N/ha in 2016 and 2017, respectively. In case of seed yield as affected by different seeding rate, the highest seed yield was achieved with a seeding rate of 130 kg/ha(p<0.05), and based on nitrogen fertilizing levels, the highest yield was obtained in 50 kg of N/ha compared to others. The crude fiber(CF), neutral detergent fiber(NDF) and total digestible nutrients(TDN) of oats cultivated and harvested in spring 2016 and 2017 according to different sowing rate were the highest in the seeding rate of 130 kg/ha. The crude protein(CP) content and total digestible nutrients(TDN) of 2016-2017 as influenced by nitrogen fertilizer levels were the highest in the nitrogen fertilizer level of 90 and 50 kg N/ha, respectively. In conclusion, the proper seeding rate and the optimal nitrogen fertilizing level in Gyeongju, Gyeongbuk province were considered to be the most appropriate in 130 kg/ha and 50 kg of N/ha, respectively.

ABSTRACT
 Introduction
 Materials and Methods
  1 Location of study
  2 Climate characteristics of the research site
  3 Survey items
  4 Physicochemical properties of soil in the experimentalsite
  5 Experimental treatments
  6 Land preparation and seeding period
  7 Chemical composition Analysis
  8 Statistical Analysis
 Results and Discussion
  1 Effect of seeding rate and nitrogen fertilizing levelson the emergence date, emergence rate, lodging rate,heading date, flowering date and maturing date
  2 Plant height, culm length, panicle length, number ofculm, number of panicle, effective culm as affectedby different seeding rate
  3 Plant height, culm length, panicle length, number ofculm, number of panicle, effective culm as affectedby different fertilizer levels
  4 Effect of seeding rate on the yield components andseed yield of oats
  5 Effect of fertilizer level on the yield, yield componentsand seed yield
  6 Feed value(chemical composition, %) of oats
 References

• Byamungu Mayange Tomple(Department of Animal Resources, College of Life and Environmental Science, Daegu University)
• Jo Ik Hwan(Department of Animal Resources, College of Life and Environmental Science, Daegu University) Corresponding author