Research Articles >
College of Agric and Natural Resources >
Please use this identifier to cite or link to this item:
|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|
|Appears in Collections:||College of Agric and Natural Resources|
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.