Distribution of zinc in selected soil profiles from Nigeria
1978
Osiname, O. A., (O.A.O.: Institute of Agricultural Research and Training, University of /fe, P.M.B. 5029, Moor | Kang, B. T., (O.A.O.: Institute of Agricultural Research and Training, University of /fe, P.M.B. 5029, Moor
Selected soil profiles from Nigeria were analysed for total and extractable (0.1 N HCl extractable) Zn. The objective was to examine the Zn status of these selected soils and to provide some information on the extent of possible Zn deficiencies. Total Zn in surface soils ranged between 12.5 and 35.0 ppm selected for the forest zone and between 10.8 and 24.0 ppm for the savanna zone soils. These values are considered low compared with those reported elsewhere. In both forest and savanna soil profiles, total Zn tended to increase with depth and was positively correlated with the clay and Fe203 contents. Extractable Zn was higher in the forest than in the savanna soils. Unlike total Zn, extractable Zn decreased with depth and was correlated with soil organic C. Results of this work show that there is a potential for Zn deficiency in most of the soil profiles studied. This potential is, however, greater in the savanna than in the forest zone.
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