Nitrogen Nutrition of Some Local Rice Varieties Grown without Fertilizer on Acid Sulphate Soil Area in South Kalimantan. j Trop. Soils [Internet]. 2009 Jan. 1 [cited 2026 May 6];14(1):41-7. Available from: https://journal.unila.ac.id/index.php/tropicalsoil/article/view/15