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BSc-MSc Thesis and Internship Projects, Wageningen University

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The effect of Zn and Cu fertilizer management on crop response evaluated by multi-surface modelling and soil extractions
The essential nutrients for crop growth can be divided into macro-and micronutrients, depending on the necessary quantity. There is growing evidence that the lack of crop growth response to regular NPK fertilizer often can be expl ...
Supervisor: Elise van Eynde
Department: Soil Chemistry and Chemical Soil Quality
 
Adsorption of pesticides to mineral reactive soil surfaces
Pesticides are a varied group synthetic organic molecules used to protect crops from damage and increase yields. Their use, however, is very inefficient, with only about 0.1% reaching their target pest. The rest is lost through de ...
Supervisor: Bert-Jan Groenenberg and Bram Geysels
Department: Soil Chemistry and Chemical Soil Quality
 
Influence of magnesium ions on the availability of phosphate bound by ferrihydrite nanoparticles
Introduction: Phosphate adsorption to iron and aluminium oxides is a major process that regulates the bioavailability of phosphate in nature. Ferrihydrite (Fh) is a natural Fe-oxide material that has a very high binding capacity  ...
Supervisor: Tjisse Hiemstra and Juan Carlos Mendez
Department: Soil Chemistry and Chemical Soil Quality
 
Effects of enhanced silicate weathering and biochar combinations on soil C sequestration, nutrient and metal dynamics in soils and plants
To limit global temperature rise well below 2°C as was agreed in the Paris Agreement, large scale application of Negative Emission Technologies (NETs) is required. Two key examples of NETs are biochar and enhanced silicate weather ...
Supervisor: dr. Mathilde Hagens, Emily te Pas
Department: Soil Chemistry and Chemical Soil Quality
 
Determining bioavailable Cu and Zn by CaCl2 extraction: effect of Ca concentration and DOC on Zn and Cu speciation in the soil solution
Copper (Cu) and Zinc (Zn) are two essential micronutrients for plants but can also be toxic when present in too high amounts. A soil extraction with CaCl2 is a common way of estimating the concentration in the soil solution, and t ...
Supervisor: Elise van Eynde, Susan Klinkert
Department: Soil Chemistry and Chemical Soil Quality
 
Synergies in plant nutrient acquisition: Can plant species with different nutrient acquisition strategies synergistically enhance the bioavailability of essential nutrients?
To realize a more sustainable agriculture practice, there is an immanent need to reduce fertilizer application and to more efficiently utilize nutrient reserves present in soils. Plants have different strategies for acquiring n ...
Supervisor: Walter Schenkeveld, Marie Zwetsloot
Department: Soil Chemistry and Chemical Soil Quality
 
Eliminating the competition: can Fe uptake by plants be improved by applying soil additives that bind elements that interfere with plant Fe acquisition strategies?
Iron (Fe) is an essential micronutrient to plants that is abundantly present in almost all soils. However, in alkaline and calcareous soils with a circumneutral pH (7 – 8.5), covering approximately one third of the earth’s land su ...
Supervisor: Walter Schenkeveld
Department: Soil Chemistry and Chemical Soil Quality
 
Towards a mechanistic basis for the DTPA/EDTA-extraction for establishing the micronutrient availability in soils
Poor availability of micronutrients like Fe, Zn, Cu and Mn can limit primary productivity and dramatically reduce crop yields. Micronutrient deficiency in crops is particularly (but not exclusively) observed on alkaline and calcar ...
Supervisor: Walter Schenkeveld and Bert-Jan Groenenberg
Department: Soil Chemistry and Chemical Soil Quality
 
High affinity adsorption to Fe-oxide nano particles. Does it occur and is sulfate involved?
Sulfate is an anion omnipresent in natural systems, where it is bound by metal (hydr)oxides. Ferrihydrite is the most reactive nano-Fe-oxide material in nature. Therefore, its ion adsorption properties are crucial for understandin ...
Supervisor: Tjisse Hiemstra and Walter Schenkeveld
Department: Soil Chemistry and Chemical Soil Quality
 
Development of a terrestrial biotic ligand model for toxicity of metals in soil
Biotic Ligand Models (BLMs) are advanced models for toxic effects of metals on plants and organisms taking into account their bio-availability by including the metal’s chemical speciation and competition by other (metal) cations.  ...
Supervisor: Bert-Jan Groenenberg
Department: Soil Chemistry and Chemical Soil Quality
 
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