The effect of adding biopolymers on the physical properties of peat soils Dewi Janti Setyaningrum, Dewi Amalia, Mulyadi Yuswandono, Atmy Verani Rouly Sihombing, Ridho Septian and Faisal Estu Yulianto E3S Web of Conf., 479 (2024) 06004 Published online: 18 January 2024 DOI: 10.1051/e3sconf/202447906004