• The Value of Soil: A Spatial Perspective

    Soil scientists like to remind everyone that “soil is not dirt,” but what is the difference? One way to answer that question is to identify where it is. Is it somewhere that it is useful, fulfilling its role as supporting life and improving environmental quality? Or has it been moved to a place where it actually causes problems, while the place it came from is also handicapped by the loss of functional ability?

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  • Comparison of spatial association approaches for landscape mapping of soil organic carbon stocks

    A comparison of direct and indirect approaches for mapping SOC stocks from rule-based, multiple linear regression models applied at the landscape scale via spatial association. The final products for both strategies are high-resolution maps of SOC stocks (kg m‾²), covering an area of 122 km², with accompanying maps of estimated error. Although the indirect approach fit the spatial variation better and had a lower mean estimated error for the topsoil stock, the mean estimated error for the total SOC stock (topsoil + subsoil) was lower for the direct approach. The optimal approach would depend upon the intended use of the map.

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