Optimization of Protease Production Using Agro Wastes by Aspergillus spp. In A Solid-State Fermentation Hadiza Jamilu*, Esther O. Onyike & Suleiman Nasir Abstract Agricultural wastes are highly nutritious and facilitate microbial growth and metabolism. Most agro-wastes are lignocellulosic in nature, composed of lignin, hemicellulose and cellulose. Agricultural residues can be