ABSTRACT This study aims to determine the interaction effect of applying biofertilizer with NPK and each factor and to obtain a combination of biofertilizer and NPK fertilizers that can increase the growth and production of shallot plants. The first factor is giving biofertilizer with 3 levels, namely 0, 10, and 20 ml.l-1. The second factor was the application of NPK with 3 levels, namely 200,…