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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/12179

Title: MacCarthy et al.: Spatial variability of some soil chemical and physical properties 47 Spatial Variability of Some Soil Chemical and Physical Properties of an Agricultural Landscape
Authors: MacCarthy, D. S.
Agyare, W. A.
Vlek, P. L. G.
Adiku, S. G. K.
Issue Date: Jan-2013
Publisher: West African Journal of Applied Ecology
Citation: West African Journal of Applied Ecology, 21(2):47-61
Abstract: Spatial variations for selected soil chemical and physical properties were examined for a landscape at Navrongo, Ghana. This was done in order to identify their spatial distribution to assist in designing land management that seeks to reduce the extremes of land productivity and support more uniform agricultural production. A landscape of 1.5 km2 was sub divided in grids of 100 m  100 m. Soil samples collected at two sampling depths (0–15 cm and 15–30 cm) both disturbed (chemical analysis) and undisturbed (physical analysis) were analysed for their chemical and physical properties. Mini pits (0–70 cm) were used to describe and identify the soil series at each vertex of the grids.Data were analysed both statistically and geo-statistically on the basis of the semi-variogram. Eutric Gleyic Regosol and Endoeutric-stagnic Plintosol were the dominant soil series used for cultivation. The fertility status of the soil is, however, poor and requires external inputs for optimal crop production. Variability within soil properties was high, a phenomenon that could be attributed to human influence. Spatial dependencies of soil properties were generally moderate with nugget: sill ratio (an indicator of spatial dependency) being between 26% and 75%. Spatial dependency was generally lower in the top-soil than in the sub-soil, a probable indication of human activities. Total nitrogen (N) distribution exhibited no spatial dependency, while organic carbon showed strong spatial dependency. Consequently, site-specific fertilization management for N is not possible at the sampling density used in this study. On the contrary, soil organic carbon and available phosphorus can be adequately managed for precision agriculture.
Description: This article is published in West African Journal of Applied Ecology
URI: http://hdl.handle.net/123456789/12179
Appears in Collections:College of Agric and Natural Resources

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