Pengaruh Biochar Sekam Padi Dan Sumber Pupuk Fosfat Terhadap Sifat Kimia Tana…

ABSTRACT This study aims to determine the interaction, combination and effect of rice husk biochar and a source of phosphate fertilizer on the chemical properties of Ultisol soil and the growth and yield of shallot plants. The research was carried out at the Experimental Garden and Laboratory of Soil Science, Faculty of Agriculture, University of Riau from May to August 2022. The research was …