COOKEY, C.; Keyagha, R.; Umeh, O.; Okoli, N.; Ogwudire, V.; Alagba, R.; Echereobia, C.; Nwokeji, E. Efficacy of poultry manure and biochar of cassava peels on root-gall nematode (Meloidogyne incognita) of okra (Abelmoschus esculentus) in an endemic Ultisol.: Application of Biochar and Poultry Manure in Nematode-Infested Soils. Int. J. Agric. Tech. 2025, 21, 491-506.