“…In Korea, IRG accounts for 97% of the total cultivated area of winter forage crops and 59.9% of the total forage production in 2017. In the southern area of Korea, particularly in Jeonnam province, 62% of the production area was used for the cultivation of IRG [ 7 , 19 , 20 ]. Due to its high protein content and energy efficiency, IRG has become increasingly popular among beef producers as a roughage source.…”