Spatial analysis of soil salinity and soil structural stability in a semiarid region of New South Wales, Australia

Environmental Management
Inakwu O A Odeh, Alex Onus

Abstract

Salt-affected soils are a major threat to agriculture especially in the semiarid regions of the world. The effective management of these soils requires adequate understanding of not only how water and, hence, solutes are transported within the soil, but also how soil salinity and sodicity spatially interact to determine soil structural breakdown. For sustainable agricultural production, information on quantitative soil quality, such as salinity, is required for effective land management and environmental planning. In this study, quantitative methods for mapping indicators of soil structural stability, namely salinity and sodicity, were developed to assess the effect of these primary indicators on soil structural breakdown. The current levels of soil salinity, as measured by electrical conductivity (EC) of the soil/water suspension, soil sodicity, represented by exchangeable sodium percentage (ESP), and aggregate stability, were assessed. Remote sensing, geographical information system (GIS), and geostatistical techniques--primarily regression-kriging and indicator-kriging--were used to spatially predict the soil sodicity and salinity. The patterns of salinity (EC) and sodicity (ESP>5%) were identified. The effect of land use on...Continue Reading

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Jun 24, 2014·The Science of the Total Environment·Zulpiya MamatMamattursun Eziz

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