Characterizing highland maize-mixed farming systems of Lao PDR’s Xiengkhouang Province (Kham, Moke, Nonghet): statistical analysis and participatory validation - Zepeda Villarreal, E. Adair; Mponela, Powell; Phoutthasinh Phimmachanh; Tom Louanhsakha; Phonepaseuth Phaphoungern; Tiemann, Tassilo T.; Krupnik, Timothy J.; Lopez-Ridaura, Santiago (International Maize and Wheat Improvement Center, 2025)