Narafidya, A., Sumarsono, J., Haji Abdullah, S. and De Side, G.N. 2023. Application of The Sub-Surface Drip Irrigation System For Cellery (Apium Graveolens L.) Using Thread Hose on Sandy Clay Soil. J-AGENT (Journal of Agricultural Engineering and Technology). 2, 1 (Nov. 2023), 22-29.