The study evaluated the effect of anthropogenic activities on the physico-chemical properties of soils of Awka South, LGA, Anambra state, Southeastern Nigeria. Triplicate soil samples were collected from three (3) soil depths (0-15cm, 15-30 cm and 30-45 cm) in four land use types; sand mining, play ground, arable land and forest land of Agu Awka, Amowbia, Okpuno and Ifite respectively. Physico-chemical properties and heavy metals concentration of the soils were analyzed using standard methods. Analysis of variance and correlation analysis were performed using Genstat Statistical Package Version 18. Results showed that soil properties were significantly (P<0.05) influenced by the different anthropogenic activities and were not uniformly distributed down the depths. Soils were dominated by loamy sand and were moderately compacted with low moisture content. The soils were generally acidic (4.47-.5.83) irrespective of depth and landuse.Organic carbon (0.263-0667 %) and total nitrogen (0.028-0.069 %) were low and were seriously reduced by human activities. Available phosphorus (6.12-8.91 ppm) was seriously increased in sand mining compared to other land use types moreover, sand mining activities decreased and increased Ca (5.32-1.99 cmolkg-1) and Na (0.020-0.32 cmolkg1), respectively. Total exchangeable acidity was reduced in all the land use types apart from playground where there was slight increase (1.57-1.70 cmolkg-1). Total exchangeable bases and ECEC followed decreasing pattern of forest > arable land > sand mining > playground. Results further showed that all the heavy metals (Ni, Cu Cd and Cr) where generally low and were below critical levels. They varied significantly (P< 0.05) among the land use types. Overall, heavy metal distribution of the soils followed decreasing trend as follows; Ni (playground (0.034 mgkg-1) > arable land (0.023 mgkg-1) > sand mining (0.029 mgkg-1) > forest (0.017 mgkg-1) Cd (play ground (0.045 mgkg-1)> arable land (0.028mgkg-1) > forest (0.016 mgkg-1) > sand mining (0.007 mgkg-1), Cr (play ground (0.040 mgkg-1) > sand mining (0.037 mgkg-1) > forest (0.032 mgkg-1) > arable land (0.031 mgkg-1). Soil pH, Ca, Mg, TEB and ECEC had strong significant influence on Cd and Cr. Furthermore, result of multiple regressions revealed that combined efforts of pH, OC, ECEC, clay, BD and Mc contributed significantly 50.1 %, 45.9 %, 47.3 % and 36.7 % of Ni, Cu, Cd and Cr respectively. To improve the fertility status of these soils especially arable land, the use of organic and/or inorganic fertilizer is required.
EJIOGU, N (2021). EFFECT OF ANTHROPOGENIC ACTIVITIES ON SOIL IN AWKA NORTH LOCAL GOVERNMENT AREA OF ANAMBRA STATE. Afribary. Retrieved from https://afribary.com/works/effect-of-anthropogenic-activities-on-soil-in-awka-north-local-government-area-of-anambra-state
EJIOGU, NNAMDI "EFFECT OF ANTHROPOGENIC ACTIVITIES ON SOIL IN AWKA NORTH LOCAL GOVERNMENT AREA OF ANAMBRA STATE" Afribary. Afribary, 13 Jul. 2021, https://afribary.com/works/effect-of-anthropogenic-activities-on-soil-in-awka-north-local-government-area-of-anambra-state. Accessed 04 Aug. 2021.
EJIOGU, NNAMDI . "EFFECT OF ANTHROPOGENIC ACTIVITIES ON SOIL IN AWKA NORTH LOCAL GOVERNMENT AREA OF ANAMBRA STATE". Afribary, Afribary, 13 Jul. 2021. Web. 04 Aug. 2021. < https://afribary.com/works/effect-of-anthropogenic-activities-on-soil-in-awka-north-local-government-area-of-anambra-state >.
EJIOGU, NNAMDI . "EFFECT OF ANTHROPOGENIC ACTIVITIES ON SOIL IN AWKA NORTH LOCAL GOVERNMENT AREA OF ANAMBRA STATE" Afribary (2021). Accessed August 04, 2021. https://afribary.com/works/effect-of-anthropogenic-activities-on-soil-in-awka-north-local-government-area-of-anambra-state