Setiabudi, A.F., Hermawan, W. and Setiawan, R.P.A. 2025. Optimization of Suction Channel System on Vacuum-Type Soybean Seed Metering System Powered by Hand Tractor. Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering). 14, 2 (Mar. 2025), 391–403. DOI:https://doi.org/10.23960/jtep-l.v14i2.391-403.