Biochemical Response of Hybrid Maize (Zea mays L.) to NPK Fertilization Based on Spent Bleaching Earth in Field ScaleCahya Anugrah, Didik Indradewa and Eka Tarwaca Susila PutraE3S Web Conf., 142 (2020) 01004DOI: https://doi.org/10.1051/e3sconf/202014201004