Sakhunkhu, Sudarath, and Supot Faungfupong. “Effects of Tillage Systems and Methods of Weed Control on Grain Yield and Some Agronomic Characteristics of Corn”. Agriculture and Natural Resources 19, no. 2 (May 1, 1985): 85–91. accessed August 28, 2026. https://li01.tci-thaijo.org/index.php/anres/article/view/242435.