Biogas Slurry Application to Enhance Spinach (Spinacia oleracea L.) Growth and Improve Polluted Soil Properties. - El-Beltagi, Hossam S.; El-Nady, Mohamed Fathi; El-Mogy, Mohamed M.; Salem Metwaly, Metwaly Mahfouz; Ismail, Ahmed Mahmoud; Shabana, Mahmoud A.; Kesba, Hosny Hamed; Abd El-Al, Saffaa S. M.; Elmenofy, Wael; Abd El-Aziz, Mohamed A.; Hamed, Lamy; El-Naqma, Kholoud Ahmed (Polish Journal of Environmental Studies, 2026)