THE EFFECTIVENESS OF NATURAL PLANT GROWTH REGULATORS (PGRS) FROM BEAN SPROUTS EXTRACT AND NPK 15-15-6-4 ON THE GROWTH OF OIL PALM SEEDLINGS (Elaeis guineensis Jacq.): EFEKTIVITAS ZPT ALAMI EKSTRAK TOGE DAN NPK 15-15-6-4 TERHADAP PERTUMBUHAN BIBIT KELAPASAWIT (Elaeis guineensis Jacq.). ROCE. 2026;3(2). doi:10.71275/roce.v3i2.185