Asymmetric above- and below-ground interactions: Light availability drives root morphogenesis and productivity in maize–soybean intercropping - Binbin Qiang; Zinan Yan; Xinbo Zhang; Zhen Fan; Juanjuan Zhang; Mengwei Cheng; Yulin Wu; Benjie C. Timbang; Tie Cai; Enke Liu; Xining Zhao; Xiaolong Ren; et al. (Soil and Tillage Research, 2026)