TEST THE POTENTIAL GROWTH AND YIELD OF PLANTS PAK CHOI (Brassica Rapa Subsp. Chinensis (L.) Hanelt Var. Green) THROUGH HYDROPONICS SYSTEM-NUTRIENT FILM TECHNIQUE AT THE LEVEL OF THE CONCENTRATION OF NUTRIENTS ®AB MIX. JAT 2021, 2 (2), 62-69. https://doi.org/10.35791/jat.v2i2.35335.