Aprilliansyah, M. C.; Mustamu, N. E.; Saragih, S. H. Y.; Sitanggang, K. D. Growth Improvement Corn Plant (Zea Mays L.) F1 Local Variety of North Sumatera Which Has under Light Irradiation Gamma Using NPK Mutiara Fertilizer . JUATIKA 2025, 7, 344 -.