The Effect Of The Addition Of Polyvinyl Alcohol (PVA) Concentrations on the Characteristics of The Carboxymethyl Cellulose (CMC)-Poly (Acrylic Acid) Hydrogel Superabsorbent as a Planting Medium - Maulidina, Rahma Falah; Universitas Muhammadiyah Purwokerto (Universitas Ahmad Dahlan, 2022)