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Faculty for Biology, Chemistry, and Earth Sciences

Soil Physics - Prof. Dr. Andrea Carminati

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Current Theses



Bachelor's Theses
Henri Michael Braunmiller (2020) Impact of soil drying on mucilage production and rheology

Mucilage is a polymeric gel containing polysaccharides and lipids. It is exuded by the root tips and holds large amounts of water. This keeps the rhizosphere moist, especially under dry conditions. With higher variability of rainfall and more extreme weather events (e.g. drought) caused by the human made climate change, this could be an important trait for our crops to maintain a constant yield even under unfavorable conditions.

The idea of my project is to show the effect of variety and water availability on the production of mucilage and its rheological parameters. Therefore I use two different maize varieties (B73 and Mo17) and two different water contents. The mucilage is being measured and compared for its amount, viscosity and surface tension value. In addition, we will observe the behavior of the mucilage in soil using a neutron radioscope. This allows us to measure it without intercepting the soil.



Supervisor: Mutez Ali Ahmed, Andrea Carminati


Master's Theses
Anna Sauer (2020) Investigating drought traits in sorghum landraces - A lysimetric experiment in four soil textures

Water availability is a primary limitation to crop production and depends on water input and soil texture, among others. A huge variety of sorghum landraces promises unexplored traits to overcome water stress, like high transpiration efficiency or early maturity.

 To test these, four sorghum landraces and one elite line were grown in four soil textures in a lysimetric facility in ICRISAT, India. Nitrogen fertilization was either added by mineralized or organic sources. The soil was dried down to 30 % usable field capacity. Weekly measured transpiration and data of biomass, plant development, yield and more will be analyzed and may reveal traits to overcome drought stress.



Supervisor: Mutez Ali Ahmed, Andrea Carminati, Jana Kholova
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