ECONOMIC EFFICIENCY OF PIG FATTENING USING FEED WITH LOW-DIGESTIBLE PROTEIN AND ADDING THE AMINO ACID SUPPLEMENT AMINOPRO. - BUTENKO, Roman; MYKHALKO, Oleksandr; OPARA, Victor; KYSELYOV, Oleksandr; LYKHACH, Anna; CHEPIL, Liudmyla; ZLAMANIUK, Liudmyla; KOVALCHUK, Yurii (Scientific Papers Series Management, Economic Engineering in Agriculture & Rural Development, 2025)