- Czech University of Life Sciences Prague
- University of Tübingen
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- Texas Tech University
- Louisiana State University
- Department of Plant & Soil Science
- Independent Scholar
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- University of Cape Town
- Department of Environmental and Geographical Science
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- Czech University of Life Sciences Prague
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- Czech University of Life Sciences Prague
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- Mekelle University
- Botswana International University of Science and Technology
- Jimma University Ethiopia
- University of Tübingen
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- Czech University of Life Sciences Prague
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- Louisiana State University
- School of Plant
- School of Plant, Environmental and Soil Sciences
- University of Jordan
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- Louisiana State University
- North Dakota State University
- School of Plant
- Carrington Research Extension Center
- Carrrington Research Extension Center
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- Czech University of Life Sciences Prague
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- Czech University of Life Sciences Prague
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- Czech University of Life Sciences Prague
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- Texas Tech University
- Humboldt University of Berlin
- Albrecht Daniel Thaer Institute for Agricultural and Horticultural Sciences
- Department of Plant & Soil Science
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- Stellenbosch University
- Department of Soil Science
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- Namibia University of Science and Technology
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- University of Ottawa
- University of Ghana
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- Botswana International University of Science and Technology
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- School of Geography
- University of the Witwatersrand
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- Chinese Academy of Sciences
- Key Laboratory of Soil Environment and Pollution Remediation
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- Texas Tech University
- Department of Plant & Soil Science
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- Indian Institute of Technology Kharagpur
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- Czech University of Life Sciences Prague
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- Czech University of Life Sciences Prague
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- University of the Witwatersrand
- School of Geosciences
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- Texas Tech University
- Department of Plant & Soil Science
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- University of Johannesburg
- Czech University of Life Sciences Prague
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- Botswana International University of Science and Technology
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- Alex Ekwueme Federal University Ndufu-Alike Ikwo
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- Humid Forest Research Station
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- Texas Tech University
- Department of Plant & Soil Science
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- Louisiana State University
- Louisiana State University Agricultural Center
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- University of Nigeria
- Ruhr University Bochum
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- Botswana International University of Science and Technology
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- Texas Tech University
- Department of Plant & Soil Science
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- Botswana International University of Science and Technology
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- Heidelberg University
- Heidelberg University of Education
- University of Nigeria
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- Michael Okpara University of Agriculture
- Smithsonian Institution
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- Louisiana State University
- Louisiana State University Agricultural Center
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