The researchers wanted to find the best time to plant rice after harvesting barley in Honam plain areas. They tested different rice varieties and seeding dates to see which ones gave the best results. They found that planting earlier led to more seedlings, but some varieties were more prone to falling over in the field. For early maturing rice, the best seeding date was June 20, while for medium maturing rice, it was June 15. Planting after these dates led to lower rice yields. Overall, the best time to plant rice after barley in Honam plain area is around June 10.