Oktavia, Putri, Resti Fevria, Vauzia Vauzia, Abdul Razak, and Yulkifli Yulkifli. 2025. “Effect of Sensor and Based NPK on The Growth of Red Spinach (Amaranthus Tricolor L.) Cultivated Hydroponic”. Jurnal Biologi Tropis 25 (1):750-56. https://doi.org/10.29303/jbt.v25i1.8328.