Chainetr, Siraprapa, Rungnapha Khiewwijit, Khanchit Ngoenkhumkhong, and Worawut Chainetr. 2022. “The Dietary Effects on Manure Characteristics and Biogas Production from Dairy Cows Feeding with Pineapple Peel”. RMUTP Research Journal Sciences and Technology 16 (1). Bangkok, Thailand:1-12. https://doi.org/10.14456/jrmutp.2022.1.