“The Effect Of Planting Distance and Dosage Of Fertilizing Cow Manage On Production Products Red Rosella (Hibiscus Sabdariffa L.): Pengaruh Jarak Tanam Dan Dosis Pemberian Pupuk Kandang Sapi Terhadap Hasil Produksi Rosela Merah (Hibiscus Sabdariffa L.)”. 2022. Procedia of Engineering and Life Science 2 (2). https://doi.org/10.21070/pels.v2i2.1267.