Improvement of Physical and Chemical Soil Quality of Oil Palm Plantation through Integrated Farming System of Cattle and Oil Palm to Achieve Sustainable Agriculture. j Trop. Soils [Internet]. 2017 May 1 [cited 2025 Nov. 8];22(2):113-2. Available from: https://journal.unila.ac.id/index.php/tropicalsoil/article/view/72