Effectivenes of NPK compound (10-30-20) to improve growth and yield of hybrid maize on vertisol soilDonald Sihombing, Catur Hermanto, Rika Asnita, Wahyu Handayati, Sri Zunaini Sa’adah, Sugiono and AbubakarE3S Web Conf., 306 (2021) 01046DOI: https://doi.org/10.1051/e3sconf/202130601046
