Journal article Open Access

Effect of Land-Use Management Systems on Coupled Hydraulic Mechanical Soil Processes Defining the Climate-Food-Energy-Water Nexus

Horn, Rainer

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        <foaf:name>Horn, Rainer</foaf:name>
            <foaf:name>Institute for Plant Nutrition and Soil Science</foaf:name>
    <dct:title>Effect of Land-Use Management Systems on Coupled Hydraulic Mechanical Soil Processes Defining the Climate-Food-Energy-Water Nexus</dct:title>
    <dct:issued rdf:datatype="">2019</dct:issued>
    <dcat:keyword>stress/strain, stress distribution, precompression stress, coupled hydraulic and mechanical processes, ecological functions</dcat:keyword>
    <dct:issued rdf:datatype="">2019-06-20</dct:issued>
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    <dct:description>&lt;p&gt;Soils are the most critical life-supporting compartments of the biosphere. They provide&lt;br&gt; numerous ecosystem services such as habitat for biodiversity, water and nutrients, as well as&lt;br&gt; producing food, feed, fiber and energy. Soils undergo intense and irreversible changes due to&lt;br&gt; a non-site adjusted land management and improper application of machinery and techniques&lt;br&gt; in its broadest sense. In combination with the growing population (until 2050 we will have&lt;br&gt; approx. 9 Billion people) the urgent need for a more reliable dataset of soil properties and soil&lt;br&gt; functions gains in importance in order to even prepare more reliable models for various&lt;br&gt; requests. The mechanical strength &amp;ndash; the precompression stress - as the result of geo-, pedoand&lt;br&gt; anthropogenic long-term processes - can be defined as the basis for quantifying the&lt;br&gt; rigidity boundary. It distinguishes between the recompression stress (i.e. elastic, rigid&lt;br&gt; properties) and the virgin compression stress range where plastic deformation including&lt;br&gt; irreversible changes of properties and functions occur. The changes in the hydraulic or&lt;br&gt; pneumatic functions like hydraulic or air conductivity, the pore size distribution primarily all&lt;br&gt; occur in the virgin compression stress range, The same is also true for redox reactions and the&lt;br&gt; biological activity (respiration) in soils but also carbon sequestration potential is also linked&lt;br&gt; with the precompression stress value. Thus, a more precise definition and following of sitespecific&lt;br&gt; functionality differences, which may exclude or concentrate certain land use or&lt;br&gt; management forms are needed, in order to optimize yield, soil protection and a sustainable&lt;br&gt; land use management considering the limited site specific resilience at the same moment.&lt;/p&gt;</dct:description>
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