RGB-UAV-based phenotyping reveals the influence of planting density on physiological traits, biomass, and yield in buckwheat. - Karunathilake EMBM; Mansoor S; Lee SM; Han GD; Nguyen TN; Nguyen HTT; Kittipadakul P; Vuttipongchaikij S; Do MC; Chung YS (BMC plant biology, 2026)