Chapter 2: composite soil properties

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6 Terms

1
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Solid phase

  • mineral fraction

  • organic fraction: live organisms and plant/animal residues

2
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The solid phase has a dominant influence on…

heat, water and chemical transport and retention processes

3
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Volume fractions

V = Vg + Vl + Vs

4
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Bulk density

density of the composite soil matrix in its natural form

  • mass of oven-dry soil per soil volume

  • ρb = ms / V

5
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Bulk density is affected by…

  • sorting of soil particles (well sorted = lower ρb)

  • organic matter content

  • degree of compaction

  • tillage

  • mineralogy in highly weathered tropical soils

6
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Core method

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