Wannaronk, K. and Senanarong, A. 2003. Research and Development of an Off-Set Rotary Cultivator Implementing with a Small Four-Wheel Tractor for Fruit Tree Cultivation. Thai Agricultural Research Journal. 21, 3 (Dec. 2003), 226–234. DOI:https://doi.org/10.14456/thaidoa-agres.2003.17.