Wakindiki, I. C. C.Nciizah, A. D.Maripa, Mahlodi Ramsy2019-10-182019-10-182019-09-20Maripa, Mahlodi Ramsy (2019) Spatial variability of hydraulic properties as affected by physical properties of selected soil types in South Africa, University of Venda, South Africa.<http://hdl.handle.net/11602/1482>.http://hdl.handle.net/11602/1482MSCAGRDepartment of Soil ScienceSoil hydraulic and hydraulic-related physical properties are key to soil productivity and these properties are widely studied. Nevertheless, their spatial variability is least understood. Two sites were selected for this study (University of Venda Experimental farm and Roodeplaat, Agricultural Research Council farm). The objectives of this study were to determine the spatial variability of soil water content, water infiltration and hydraulic conductivity on selected soils. Field measurements were done on a 20 m × 20 m. Soil hydraulic and hydraulic-related physical properties were studied at two depths, 0 – 0.2 m top soil and 0.2 – 0.4 m sub soil. The field was irrigated to saturation and let to drain freely for two days. The soil was quickly secured in water cans to avoid further loss of water by evaporation and taken to the laboratory for analysis. Data was analysed using ordinary kriging method in ArcMap® software version 10.4 to generate spatial variability maps and semi variograms. The University of Venda Experimental farm had lesser spatial variability with coefficient of variation ranging from 9.6 to 33.4%. The spatial variability of soil was very low confirmed by contour maps depicting slightly homogeneity. Whereas, the soil hydro-physical properties displayed greater spatial variability at Roodeplaat, Agricultural Research Council Experimental farm. The empirical variograms of spherical model fits were also assuming weak spatial dependence with a curve variogram. The coefficient of variation ranged from 10.5 to 51.9%. Therefore, the greater variability at Roodeplaat, Agricultural Research Council Experimental farm indicated that coarse soil texture under conventional tillage has a greater influence on the spatial variability of the soil hydro-physical properties.1 online resource (xii, 64 leaves : color illustrations))enUniversity of VendaSemi-variogramUCTDKrigingMini-desk infiltrometerHydraulic conductivity631.4320968Soils -- South AfricaSoil texture -- South AfricaSoil moisture -- South AfricaDissertationMaripa MR. Spatial variability of hydraulic properties as affected by physical properties of selected soil types in South Africa. []. , 2019 [cited yyyy month dd]. Available from: http://hdl.handle.net/11602/1482Maripa, M. R. (2019). <i>Spatial variability of hydraulic properties as affected by physical properties of selected soil types in South Africa</i>. (). . Retrieved from http://hdl.handle.net/11602/1482Maripa, Mahlodi Ramsy. <i>"Spatial variability of hydraulic properties as affected by physical properties of selected soil types in South Africa."</i> ., , 2019. http://hdl.handle.net/11602/1482TY - Dissertation AU - Maripa, Mahlodi Ramsy AB - Soil hydraulic and hydraulic-related physical properties are key to soil productivity and these properties are widely studied. Nevertheless, their spatial variability is least understood. Two sites were selected for this study (University of Venda Experimental farm and Roodeplaat, Agricultural Research Council farm). The objectives of this study were to determine the spatial variability of soil water content, water infiltration and hydraulic conductivity on selected soils. Field measurements were done on a 20 m × 20 m. Soil hydraulic and hydraulic-related physical properties were studied at two depths, 0 – 0.2 m top soil and 0.2 – 0.4 m sub soil. The field was irrigated to saturation and let to drain freely for two days. The soil was quickly secured in water cans to avoid further loss of water by evaporation and taken to the laboratory for analysis. Data was analysed using ordinary kriging method in ArcMap® software version 10.4 to generate spatial variability maps and semi variograms. The University of Venda Experimental farm had lesser spatial variability with coefficient of variation ranging from 9.6 to 33.4%. The spatial variability of soil was very low confirmed by contour maps depicting slightly homogeneity. Whereas, the soil hydro-physical properties displayed greater spatial variability at Roodeplaat, Agricultural Research Council Experimental farm. The empirical variograms of spherical model fits were also assuming weak spatial dependence with a curve variogram. The coefficient of variation ranged from 10.5 to 51.9%. Therefore, the greater variability at Roodeplaat, Agricultural Research Council Experimental farm indicated that coarse soil texture under conventional tillage has a greater influence on the spatial variability of the soil hydro-physical properties. DA - 2019-09-20 DB - ResearchSpace DP - Univen KW - Semi-variogram KW - Kriging KW - Mini-desk infiltrometer KW - Hydraulic conductivity LK - https://univendspace.univen.ac.za PY - 2019 T1 - Spatial variability of hydraulic properties as affected by physical properties of selected soil types in South Africa TI - Spatial variability of hydraulic properties as affected by physical properties of selected soil types in South Africa UR - http://hdl.handle.net/11602/1482 ER -