NABU M, Neonbeni E. Effect of biochar dosage and chiken manure on the growth and yield of spinach plants (amaranthus tricolor l.). Savana Cendana [Internet]. 16Jul.2025 [cited 3Oct.2025];10(1):1-. Available from: http://savana-cendana.id/index.php/SC/article/view/1080