ARI GUNAWAN; EKA BOBBY FEBRIANTO. STRATEGY TO INCREASE PRODUCTIVITY OF 20-25 YEAR AGE PALM OIL PLANTS AT PT.PP LONDON SUMATRA BAGERPANG ESTATE. International Journal of Social Science, Educational, Economics, Agriculture Research and Technology (IJSET), [S. l.], v. 5, n. 8, p. 4781–4786, 2026. Disponível em: https://ijset.org/index.php/ijset/article/view/2094. Acesso em: 8 jul. 2026.