Morphogenesis, physico-chemical properties, mineralogical composition and nature of parent materials of some alluvial soils of the Lower Niger River plain, Nigeria

Authors : Achimota DİCKSON, Joseph ARULEBA, Joseph Oyinbrakemi TATE

Pages : 72-83

Doi:10.35208/ert.973270

View : 21 | Download : 13

Publication Date : 2022-03-31

Article Type : Research Paper

Abstract :Nine pedons of alluvial origin in the Lower Niger River floodplains of Nigeria were examined for morphogenesis, physicochemical properties, mineralogical composition, and heterogeneity of the parent materials. The soils were stratified with redoximorphic features observed in the different layers reaching A-horizon with subsurface grayization. Soils that received annual alluvial enrichment were found to be structurally weak while others were moderately strong. Soil characteristics showed varying degrees of heterogeneity with source of parent materials and degrees of hydromorphism, moulding morphogenesis and gleization as major soil-forming processes. Silt loam was the predominant soil texture except ELM3 and TFN3 dominated by sandy loam and loamy sand textures. Soils were strongly acid to neutral [pH insert ignore into journalissuearticles values(H 2 O);, 4.94 – 7.00], having very low to medium organic matter insert ignore into journalissuearticles values(0.13 – 4.02 %);, and low to very high K insert ignore into journalissuearticles values(0.10 – 2.13 cmol/kg);. Quartz dominated the identified mineral phases followed by kaolinite, indicating the dominance of low activity clays and low ferromagnesian minerals presence. The presence of several K-bearing minerals in the pedons insert ignore into journalissuearticles values(micas and feldspars); suggest that the K pool could naturally be replenished. Textural diversity between the different SMUs is ascribed to different sources of the water-borne sediments and the flow rate of the floodwater at the time of deposition of the parent materials. Organic carbon distribution patterns indicated stratification and heterogeneity of parent materials. Wetness, flooding, and soil chemical and physical fertility were major constraints to increased and sustainable crop production in the Lower Niger River floodplain soils.
Keywords : Floodplain soils, Lower Niger River, mineralogical composition, morphogenesis, soil characteristics