Effect of long-term Tillage and Nitrogen Fertilization Residue on Soil Biochemical Properties and Cowpea Yield. j Trop. Soils [Internet]. 2021 Sep. 11 [cited 2025 Nov. 13];26(3):141-7. Available from: https://journal.unila.ac.id/index.php/tropicalsoil/article/view/469