Prediction of Soil Organic Carbon at Field Scale by Regression Kriging and Multivariate Adaptive Regression Splines Using Geophysical Covariates
نویسندگان
چکیده
Knowledge of the spatial distribution soil organic carbon (SOC) is crucial importance for improving crop productivity and assessing effect agronomic management strategies on response quality. Incorporating secondary variables correlated to SOC allows using information often available at finer resolution, such as proximal remote sensing data, prediction accuracy. In this study, two nonstationary interpolation methods were used predict SOC, namely, regression kriging (RK) multivariate adaptive splines (MARS), electromagnetic induction (EMI) ground-penetrating radar (GPR) data. Two GPR covariates, representing layers different depths, X geographical coordinates selected by both with similar variable importance. Unlike linear model RK, MARS also one EMI covariate. This result can be attributed intrinsic capability intercept interactions among highlight nonlinear features underlying The results indicated a larger contribution than data due resolution from that GPR. Thus, coupled geophysical recommended pointing out need improve guarantee agricultural land sustainability.
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ژورنال
عنوان ژورنال: Land
سال: 2022
ISSN: ['2073-445X']
DOI: https://doi.org/10.3390/land11030381