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International Journal of Soil Science
Year: 2008  |  Volume: 3  |  Issue: 2  |  Page No.: 62 - 68

Content and Profile Distribution of Extractable Zinc (Zn) and Some Physicochemical Properties of Soil Along a Toposequence at Bauchi, Northern Guinea Savanna of Nigeria

N. Voncir, S. Mustapha, V.A. Tenebe, A.L. Kumo and S. Kushwaha    

Abstract: The content and distribution of extractable zinc within profiles along a toposequence at the Abubakar Tafawa Balewa University, Research Farm Bauchi, Nigeria was studied. Soil samples were collected from each identified horizon of five profile pits dug at the crest, upper slope, middle slope, lower slope and valley bottom positions and subjected to laboratory analysis. The soils were sandy loam at the top and sandy clay loam or clay loam in the subsoil. Clay content was generally higher in the subsoil than in the topsoil with the pH values ranged between 5.98 and 6.18. Organic carbon although generally low was higher in the topsoil than in the subsoil and not markedly different with position along the toposequence while CEC (although generally low 3.28-5.26 cmol kg-1) was higher in the subsoil than in the topsoil. The available phosphorus was also low in all the profiles and not markedly different between the profiles. Available zinc distribution followed the pattern of organic matter distribution and it was also low with no marked difference along the toposequence.

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