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). Teknofarm [Internet]. 2025 Nov. 22 [cited 2025 Dec. 1];1(1):7-13. Available from: https://jurnal-alfatah.id/teknofarm/article/view/3