“THE EFFECT OF CONCENTRATION AND FREQUENCY OF APPLICATION OF SHALLOT EXTRACT AS A NATURAL GROWTH REGULATOR (PGR) ON THE GROWTH OF ROBUSTA COFFEE SEEDLINGS (COFFEA CANEPHORA)”. Journal Tropical Agricultural Inovation, vol. 1, no. 1, Nov. 2025, pp. 7-13, https://jurnal-alfatah.id/teknofarm/article/view/3.