Meenork, Pongthep, and Poomisit Wanacharee. 2008. “Growth and Seed Yield Production of Yam Bean(Pachyrhizus erosus (L) Urb.) at Borabue District, Maha Sarakham Provice ”. Thai Agricultural Research Journal 26 (3):264-74. https://doi.org/10.14456/thaidoa-agres.2008.22.