Ebido NE, Edeh IG, Unagwu BO, et al. Rice-husk biochar effects on organic carbon, aggregate stability and nitrogen-fertility of coarse-textured Ultisols evaluated using Celosia argentea growth. Sains Tanah J. Soil Sci. Agroclimatology. 2021;18(2):177-187. doi:10.20961/stjssa.v18i2.56330