Nwawuike IM, Oriaku USO, Eches EE, Ujunwa OA, Ezeora EC. Application of Nutrient Index and Multivariate Analysis for Soil Fertility Assessment of Rice Farms in Okigwe, Southeastern Nigeria. Direct Res. J. Agric. and Food Sci. [Internet]. 2026 May 25 [cited 2026 May 25];14(2):41-9. Available from: https://journals.directresearchpublisher.org/index.php/drjafs/article/view/743