Bernard Ludwig

Latest

• Accuracy and Reproducibility of Laboratory Diffuse Reflectance Measurements with Portable VNIR and MIR Spectrometers for Predictive Soil Organic Carbon Modeling
• Performance of in Situ vs Laboratory Mid-Infrared Soil Spectroscopy Using Local and Regional Calibration Strategies
• Performance of Field-scale Lab vs in Situ Visible/Near- and Mid-infrared Spectroscopy for Estimation of Soil Properties
• 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
• Diffuse Reflectance Infrared Spectroscopy Estimates for Soil Properties Using Multiple Partitions: Effects of the Range of Contents, Sample Size, and Algorithms
• Robustness of Visible Near-infrared and Mid-infrared Spectroscopic Models to Changes in the Quantity and Quality of Crop Residues in Soil
• In Situ and Laboratory Soil Spectroscopy with Portable Visible-to-near-Infrared and Mid-Infrared Instruments for the Assessment of Organic Carbon in Soils
• Strategies for the Efficient Estimation of Soil Organic Carbon at the Field Scale with Vis-NIR Spectroscopy: Spectral Libraries and Spiking vs. Local Calibrations
• Accuracy of Estimating Soil Properties with Mid-Infrared Spectroscopy: Implications of Different Chemometric Approaches and Software Packages Related to Calibration Sample Size
• Use of Different Chemometric Approaches for an Estimation of Soil Properties at Field Scale with near Infrared Spectroscopy
• Comparison of Portable and Bench-Top Spectrometers for Mid-Infrared Diffuse Reflectance Measurements of Soils
• Quantification of Soil Properties with Hyperspectral Data: Selecting Spectral Variables with Different Methods to Improve Accuracies and Analyze Prediction Mechanisms
• Near-Infrared Spectroscopy for Determination of Soil Organic C, Microbial Biomass C and C and N Fractions in a Heterogeneous Sample of German Arable Surface Soils
• Estimation Accuracies of near Infrared Spectroscopy for General Soil Properties and Enzyme Activities for Two Forest Sites along Three Transects
• Pitfalls in the Use of Middle-Infrared Spectroscopy: Representativeness and Ranking Criteria for the Estimation of Soil Properties
• Usefulness of Middle Infrared Spectroscopy for an Estimation of Chemical and Biological Soil Properties -- Underlying Principles and Comparison of Different Software Packages
• Usefulness of Near-infrared Spectroscopy for the Prediction of Chemical and Biological Soil Properties in Different Long-term Experiments
• Use of Near-infrared Spectroscopy to Distinguish Carbon and Nitrogen Originating from Char and Forest-floor Material in Soils: Usefulness of a Genetic Algorithm