Siahaan, A.J., Irsal and Sitorus, B. 2024. The Relationship between Climate and Productivity of Tea Plants (Camellia sinensis L.) in Bah-Butong Gardens PT. Perkebunan Nusantara IV, North Sumatra Province in 2005-2009. Jurnal Online Pertanian Tropik. 11, 2 (Aug. 2024), 1-8. DOI:https://doi.org/10.32734/jopt.v11i2.17559.