Mid-infrared spectroscopy for soil organic carbon estimation. Part II: Evaluating preprocessing at global and national scales - Tong Li; Deeksha Beniwal; Ram C. Dalal; Sean Manning; Peng Fu; Anquan Xia; Jinran Wu; Qingyang Liu; Vilim Filipović; Georgios Tsiminis; Yash P. Dang (Soil and Tillage Research, 2026)