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The aim of this study was to assess the variability of extractable micronutrients in the varying topoposition soils of Gubi village. Four profile pits were dug at each of the designated topopositions making a total of eight profiles. The profiles were dug at the crest, upper slope, middle slope and valley bottom positions of the two toposequences and were named URFGU1, URFGU2, URFGU3 to URFGU4 and URFGL1. URFGL2, URFGL3 to URFGL4 for upland and lowland respectively. The content and profile distribution of extractable micronutrients copper (Cu), Zinc (Zn), manganese (Mn) and Iron (Fe) were extracted using 0.1 m HCl solution and determined using atomic absorption spectrophotometer (AAS) at appropriate wavelengths (Ca at 247 nm, Zn at 214 nm, Mn at 279 nm and Fe at 248 nm. Data generated was statistically analyzed using analysis of variance in nested experimental design. The significance of difference between treatments was determined using fishers LSD. Means that were significantly different were separated using the Least Significant Difference (LSD). The result reveals that Copper (Cu), iron (Fe) and manganese (Mn) varied significantly due to location. Iron and manganese were significantly higher in the upland soil (47.35 and 47.50 mg/kg respectively) than in the lowland soil (17.67 and 27.38 mg/kg respectively). The lowland soil had significantly higher Cu (1.31 mg/kg) than the upland soil (0.37 mg/kg). Zinc (Zn) did not vary significantly due to location however the lowland soil (0.86 mg/kg) had a higher Zn content than the upland soil (0.26 mg/kg).
Mathayo MM, Amos EM, Robert M, Fergus S. Variability of soil micronutrients concentration along the slopes of Mount Kilmanjaro, Tanzania. Applied and Environmental Soil Science. 2016:1-7.
Carter JD. A geological map of Nigeria. Geological Survey Division. Federal Ministry of Mines and Power Lagos, Nigeria; 1964.
Kaey RW. An outline of Nigerian vegetation. Federal Ministry of Information, Lagos; 1959.
Soil survey staff. Soil survey manual. United State Department of Agriculture Agricultural Handbook No. 18. U.S Govt. printing office, Washington, D.C; 1998.
Jackon ML. Chemical composition of soils. In Bear FE (Ed). Chemistry of the soil. Reinhold Publishing Company New York. 1964;79-141.
Montgomery DC. Design and analysis of experiment. 5th edition John Wiley and Sons Inc. Newyork; 2001.
Steel RC, Torrie JH. Principles and procedures of statistics. Macmillan, New york, U.S.A.; 1981.
Esu IE. Detailed soil survey of NIHORT farm at Bunkure Kano State, Nigeria. Institute for Agricultural Research, A.B.U. Zaria. 1991;72.
Olaniyan JO. Characterization, classifica-tion and agricultural potentials of some selected soils of Kwara State, Nigeria. Nigerian Journal of Soil Science. 2013;23 (1):94-101.
Kparmwang T, Chude VO, Raji BA, Odunze AC. Extractable micronutrients in some soils developed on sandstone and shale in the Benue valley, Nigeria. Nigeria Journal of Soil Research. 2001;1:42- 48.
Alemayehu K, Beyene S, Jeff S. Characterization of problem soils in and around the south central Ethiopian Rift Valley. Journal of Soil Science and Environmental Management. 2016;7(11): 191-203.
Habibah J, Khairiah J, Ismail BS, Kadderi M.D. Iron speciation in selected agricultural soils of Peninsular Malaysia. Journal of Environmental Sciences and Technology. 2014;7(3):154-165.
Brady NC, Weil PR. The nature and properties of soils (14th ed). Prentice Hall Inc. Newyork, USA. 2004;35-40.
Tisdale SL, Nelson WL, Beaton JD, Havlin JL. Soil fertility and fertilizers. 5th ed. Prentice Hall India; 1995.
Foth HD, Ellis BG. Soil ferility. 2nd ed. Lewis CRC Press LLC., USA. 1997;290.
Foth HD. Fundamentals of soil science. John Wiley and Sons, New York U.S.A. 8th edition; 1990.