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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    <subfield code="a">stress/strain, stress distribution, precompression stress, coupled hydraulic and mechanical processes, ecological functions</subfield>
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    <subfield code="c">3 - 15</subfield>
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    <subfield code="p">Bulgarian Journal of Soil Science</subfield>
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    <subfield code="a">&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;</subfield>
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