Iswanto, M. and Abror, M. 2022. The Effect Of Planting Distance and Dosage Of Fertilizing Cow Manage On Production Products Red Rosella (Hibiscus sabdariffa L.). Procedia of Engineering and Life Science. 2, 2 (Jun. 2022). DOI:https://doi.org/10.21070/pels.v2i2.1267.