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| Home > Publications database > Exploring the potential of using GPR to investigate the soil-plant continuumof maize crops |
| Home > Publications database > Exploring the potential of using GPR to investigate the soil-plant continuumof maize crops |
| Poster (After Call) | FZJ-2026-00183 |
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2025
Abstract: The soil-plant continuum plays a vital role in regulating key processes that impact plant per-formance and agricultural productivity. Understanding these processes is becoming increas-ingly important as climate change affects agricultural systems. Diverging techniques likeagrogeophysics and crop science are currently used to investigate individual components ofthe soil-plant continuum at contrasting scales. However, since these components influenceeach other, integrated methods combining methods like ground penetrating radar (GPR)with root imaging and modelling techniques are needed. First, a study examined the impactof row crops like maize on horizontal variability in GPR-derived permittivities and root vol-ume fraction. Factors like soil type, water treatment, and atmospheric conditions were foundto influence this. A statistical analysis method was developed to visualize the trend-correctedspatial permittivity deviation, allowing correlation between permittivity variability and rootvolume fractions. Second, numerical modeling showed roots had a greater impact on GPRsignals than above-ground shoots. A new approach to derive available soil water was pre-sented, demonstrating that neglecting the root phase in petrophysical mixing models over-estimates soil water content. Third, horizontal crosshole GPR-derived soil water contents werecombined with a hydrological model to estimate soil hydraulic parameters for winter wheat.This sequential hydrogeophysical inversion was first used for a one-dimensional averagedcase, then upscaled to estimate pseudo three-dimensional spatially distributed parametersfor a dual-porosity Mualem-van-Genuchten model.
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