Aphiphan Pookpakdi, Harisadee Pataradilok, Suwit Laohasiriwong, & Adisak Suwitawatch. (1994). Difference in Yield and Growth of Soybean Cultivar S.J.4 When Planted at Khon Kaen and Kamphaeng Saen Using Different Planting Dates and Plant Population Densities. Agriculture and Natural Resources, 28(1), 1–13. retrieved from https://li01.tci-thaijo.org/index.php/anres/article/view/241369