Abubakar, Mahmud2023-12-142023-12-142015-06-06Abubakar, M. (2015). Land Use Factors Responsible for Trace Metal Concentration in Farmlands along River Antau in Keffi, Nasarawa State as Evaluated using PCAhttps://keffi.nsuk.edu.ng/handle/20.500.14448/4785Continuous irrigation using polluted water may lead to accumulation of trace metals in the irrigated soil and subsequently, their accumulation in cultivated vegetables above threshold limits of some acid leachable and easily exchangeable Cd, Cr, Cu, Fe, Mn, Ni, Pb. and Zn. Soils from irrigated farmlands were chosen based on their potentials to be contaminated by domestic, municipal and agricultural waste. Soil samples from farmlands were collected and taken for laboratoty analysis. Physical and chemical properties of soil as well as trace metals in the soils were determined. The laboratory values were subjected to Principal Component Analysis that determines the major factors responsible for the variations in the trace metals in the study area. The spatial statistical tools of the Arc Toolbox in ArcGIS software package was use in running the Ordinary Least Square (OLS) regression that tested the Global Moran’s I in the model; the model results improved when the Geographically Weighted Regression (GWR) was employed. The result shows that 3 components: Pd; Zn; and Fe account for 89.91% of the total variance of the trace metals. The results of the Spatial Autocorrelation test on the model’s regression standardised residuals, indicates a random distribution. The z-score is not statistically significant so the mdl hypothesis of complete spatial randomness of the residual is accepted. Based on the parameters concentrations and the land use impacts it was concluded that domestic and agricultural waste strongly influenced the variation and the quality of irrigated land in the area.enPollution, Trace metals, GWR, Farmlands, PC AArticle