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Laboratory Test: Albedo Analysis  (Bayreuth)


Contact: Sebastian Meyer


Albedo-measurement (photo: Daniel Fischer)

Albedo-measurement (photo: Daniel Fischer)

Albedo-measurement (photo: Daniel Fischer)

Soil sampling on the experimental field trial Bayreuth (photo: Daniel Fischer)

Soil sampling on the experimental field trial Bayreuth (photo: Daniel Fischer)

Soil sampling on the experimental field trial Bayreuth (photo: Daniel Fischer)

Aim:

Assessing the impact of biochar applications on the albedo of the background soil

Test site:

Micro meteorological laboratory of the University Bayreuth


Analyzed samples:

  • Moist soil with and without biochar application (31.5 Mg/ha), with and without compost application (70 Mg/ha) from the
    Field trial in Bayreuth
  • Dry soil samples with and without biochar application (maximum
    94 Mg/ha), with and without compost application (up to 200 Mg/ha)
    from a pot experiment

Methods:

  • Measurement of the water capacity of the soil samples
  • Application of soil samples on plastic plates (60 cm x 2 cm x 40 cm)
  • Irradiation of plastic plates with a 500 watt halogen metal halide lamp
  • Albedo-measurement with a double pyranometer (Kipp & Zonen, CM3), at 50 cm distance from the soil samples

Results:

  • Albedo reduction around at maximum 0.009 in the samples of the field trial
  • Albedo reduction around at maximum 0.014 in the samples of the pot experiment

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