Univ.-Prof. Bernard Ludwig - Research Information System | University of Kassel - CONVERIS Research Information System

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Prof. Dr. Bernard Ludwig

Projects as Principal Investigator

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04/2023 - 03/2026	Designed experiments for optimizing infrared spectroscopic characterizations and quantifications of soil organic matter at scales of increasing complexity: importance of band shifts, spectral variable selection and subtraction approaches
01/2022 - 11/2025	Combined use of laboratory-based and portable infrared and x-ray fluorescence spectroscopy approaches for the spatial-vertical characterization of samples of selected soil groups
04/2021 - 03/2024	Are interactions of labile substrates with biochars the key process explaining C stabilization by biochars? A proof of concept by isotopic approaches
04/2018 - 12/2021	Synergetic use of mobile and lab-based spectroscopic techniques (vis-NIR, lab and hand-held MIR, portable hyperspectral frame camera) to optimize the determination of soil properties with high variability in time and space
2016 - 2019	FOR 2432: Social-Ecological Systems in the Indian Rural-Urban Interface: Functions, Scales, and Dynamics of Transition - Teilprojekt: Intensivierungseffekte auf Stoffflüsse in Rural-Urbanen Anbausystemen in der Forschergruppe
2016 - 2019	Social-Ecological Systems in the Indian Rural-Urban Interface: Functions, Scales and Dynamics of Transition. Cluster A: Matter flows in rural-urban cropping systems
06/2013 - 2016	Effects of water content, input of roots and dissolved organic matter and spatial inaccessibility on C turnover & determination of the spatial variability of subsoil properties (Teilprojekt der Forschergruppe FOR 1806: Der vergessene Teil des Kohlenstoffkreislaufs: Lagerung und Umsatz des organischen Materials im Unterboden)
09/2011 - 2014	Bedeutung der Stickstoff-Aufnahmepfade von Mikroorganismen im Boden
2011 - 2015	Optimierung der Einsatzfähigkeit der Infrarot-Reflexionsspektroskopie in der Bodenökologie: Bestimmung der Zusammensetzung und Stabilität der organischen Bodensubstanz und Vorhersagen in offenen Populationen
01/2007 - 12/2010	Steuerung von Humus- und Nährstoffhaushalt in der Ökologischen Landwirtschaft

Projects as Co-Investigator

02/2019 - 12/2020	PPP China ab 2018
2007 - 2011	Steuerung von Humus- und Nährstoffhaushalt in der Ökologischen Landwirtschaft: Teilprojekt F1 - Gasförmige und sickerungsbedingte C- und N-Verluste aus gedüngten und bewässerten Ackerflächen einer subtropischen Küst
01/1994 - 12/2000	ökochemisches Profil von Enrofloxacin in Boden und Wasser

Publications

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2024	Guo, Z., Qiang, W., He, J., Han, X., Tan, X., Ludwig, B., Shen, W., Kuzyakov, Y., Gunina, A., 2024. Nitrogen deposition raises temperature sensitivity of soil organic matter decomposition in subtropical forest. Science of the Total Environment 907, 167925. https://doi.org/10.1016/j.scitotenv.2023.167925
2023	Greenberg, I., Vohland, M., Seidel, M., Hutengs, C., Bezard, R., Ludwig, B., 2023. Evaluation of Mid-Infrared and X-ray Fluorescence Data Fusion Approaches for Prediction of Soil Properties at the Field Scale. Sensors 23/2, 1–22. https://doi.org/10.3390/s23020662
2023	Ludwig, B., Greenberg, I., Vohland, M., Michel, K., 2023. Optimised use of data fusion and memory‐based learning with an Austrian soil library for predictions with infrared data. European Journal of Soil Science 74, e13394. https://doi.org/10.1111/ejss.13394
2023	Greenberg, I., Sawallisch, A., Stelling, J., Vohland, M., Ludwig, B., 2023. Optimization of sample preparation and data evaluation techniques for X‐ray fluorescence prediction of soil texture, pH, and cation exchange capacity of loess soils. Soil Science Society of America Journal 88, 27–42. https://doi.org/10.1002/saj2.20598
2022	Semella, S., Hutengs, C., Seidel, M., Ulrich, M., Schneider, B., Ortner, M., Thiele-Bruhn, S., Ludwig, B., Vohland, M., 2022. Accuracy and Reproducibility of Laboratory Diffuse Reflectance Measurements with Portable VNIR and MIR Spectrometers for Predictive Soil Organic Carbon Modeling. Sensors 22, 1–15. https://doi.org/10.3390/s22072749
2022	Ludwig, B., Wölfel, P., Greenberg, I., Piepho, H.-P., Spörlein, P., 2022. Application of mixed-effects modelling and rule-based models to explain copper variation in soil profiles of southern Germany. European Journal of Soil Science 73, e13258. https://doi.org/10.1111/ejss.13258
2022	Ludwig, B., Klüver, K., Filipinski, M., Greenberg, I., Piepho, H.-P., Cordsen, E., 2022. Description and prediction of copper contents in soils using different modeling approaches - Results of long-term monitoring of soils of northern Germany. Journal of Plant Nutrition and Soil Science 185, 876–887. https://doi.org/10.1002/jpln.202200075
2022	Greenberg, I., Seidel, M., Vohland, M., Koch, H.-J., Ludwig, B., 2022. Performance of in situ vs laboratory mid-infrared soil spectroscopy using local and regional calibration strategies. Geoderma 409, 115614. https://doi.org/10.1016/j.geoderma.2021.115614
2022	Vohland, M., Ludwig, B., Seidel, M., Hutengs, C., 2022. Quantification of soil organic carbon at regional scale: Benefits of fusing vis-NIR and MIR diffuse reflectance data are greater for in situ than for laboratory-based modelling approaches. Geoderma 405, 115426. https://doi.org/10.1016/j.geoderma.2021.115426
2022	Seidel, M., Vohland, M., Greenberg, I., Ludwig, B., Ortner, M., Thiele-Bruhn, S., Hutengs, C., 2022. Soil moisture effects on predictive VNIR and MIR modeling of soil organic carbon and clay content. Geoderma 427, 116103. https://doi.org/10.1016/j.geoderma.2022.116103