Enhancing wheat yield through improved sowing uniformity in China: A meta-analysis - Peiyin Jia; Jing-Wei Fan; Xin-Mao Li; Chu-Yi Sun; Jairo A. Palta; Hong Zhao; Wen-Yuan Luo; Lan Yang; Jian Zhang; Feng-Min Li; Yan-Lei Du (Field Crops Research, 2026)