NWAWUIKE, Ifeoma Monica; ORIAKU, Ugochukwu Stella O.; ECHES, Eberechi Esther; UJUNWA, Obinwa Augusta; EZEORA , Esther Chidera. Application of Nutrient Index and Multivariate Analysis for Soil Fertility Assessment of Rice Farms in Okigwe, Southeastern Nigeria. Direct Research Journal of Agriculture and Food Science, [S. l.], v. 14, n. 2, p. 41–49, 2026. DOI: 10.26765/DRJAFS16457234. Disponível em: https://journals.directresearchpublisher.org/index.php/drjafs/article/view/743. Acesso em: 25 may. 2026.