A. Senanarong, Y. Khaehanchanpong, and K. Wanaronk, “Research and Development of a Rotary Tiller Implementing with a Two-Wheel Tractor forSesbania rostrata Brem. and Obrem. Incorporation”, Thai Agric.Res.J., vol. 22, no. 2, pp. 136–144, Aug. 2004.