Biological preparations from crop waste for organic farmingAsilkan Dzhumanazarova, Natalia Stozhko, Dzhanymbu Dzhorupbekova, Natalia Gutsalyuk and Maria BukharinovaE3S Web of Conf., 537 (2024) 10010DOI: https://doi.org/10.1051/e3sconf/202453710010