Rahmadani T, Mahadi I, Darmadi. DEVELOPMENT OF CONVENTIONAL BIOTECHNOLOGY STUDENT WORKSHEETS THROUGH A STUDY OF LIQUID ORGANIC FERTILIZER UTILIZATION IN CELERY USING A HYDROPONIC SYSTEM. Algebra [Internet]. 2026 Mar. 31 [cited 2026 Apr. 21];6(2):420-8. Available from: https://algebra.yana.or.id/index.php/ejournal/article/view/134