pXRF in tropical soils: Methodology, applications, achievements and challenges

SHG Silva, BT Ribeiro, MBB Guerra… - Advances in …, 2021 - Elsevier
Proximal sensors have been increasingly used for a variety of purposes worldwide, with
great interest on portable X-ray fluorescence (pXRF) spectrometry applications in Soil …

Biochar as soil amendment: The effect of biochar on soil properties using VIS-NIR diffuse reflectance spectroscopy, biochar aging and soil microbiology—A review

V Tsolis, P Barouchas - Land, 2023 - mdpi.com
This literature review explores the assessment of biochar quality and its impact on soil
properties using diffuse reflectance spectroscopy. Biochar, a product of biomass pyrolysis, is …

Data fusion of vis–NIR and PXRF spectra to predict soil physical and chemical properties

Y Zhang, AE Hartemink - European Journal of Soil Science, 2020 - Wiley Online Library
We tested one front‐end data fusion method to combine visible near‐infrared (vis–NIR) and
portable X‐ray fluorescence (PXRF) spectra for predicting different soil properties and …

Integrating hyperspectral imaging with machine learning techniques for the high-resolution mapping of soil nitrogen fractions in soil profiles

S Xu, M Wang, X Shi, Q Yu, Z Zhang - Science of The Total Environment, 2021 - Elsevier
Soil nitrogen (N) plays a central role in soil quality and biogeochemical cycles. However,
little is known about the distribution and spatial variability of the different fractions of soil N …

Combined use of vis-nir and xrf sensors for tropical soil fertility analysis: Assessing different data fusion approaches

TR Tavares, JP Molin, SH Javadi, HWP Carvalho… - Sensors, 2020 - mdpi.com
Visible and near infrared (vis-NIR) diffuse reflectance and X-ray fluorescence (XRF) sensors
are promising proximal soil sensing (PSS) tools for predicting soil key fertility attributes. This …

Assessing models for prediction of some soil chemical properties from portable X-ray fluorescence (pXRF) spectrometry data in Brazilian Coastal Plains

R Andrade, SHG Silva, DC Weindorf, S Chakraborty… - Geoderma, 2020 - Elsevier
Portable X-ray fluorescence (pXRF) spectrometry is becoming increasingly popular for
predicting soil properties worldwide. However, there are still very few works on this subject …

Soil characterization across catenas via advanced proximal sensors

BM Duda, DC Weindorf, S Chakraborty, B Li, T Man… - Geoderma, 2017 - Elsevier
Abstract As countries of Eastern Europe look to advance their agricultural markets through
large scale agronomic production, high resolution mapping of soil resources will be …

Soil organic matter prediction using smartphone-captured digital images: Use of reflectance image and image perturbation

S Gorthi, RK Swetha, S Chakraborty, B Li… - Biosystems …, 2021 - Elsevier
This study evaluated a novel smartphone-based soil image segmentation technique and
subsequent machine learning (ML) optimization methodology with a set of soil images for …

Using vis-NIR and pXRF data to distinguish soil parent materials–an example using 136 pedons from Wisconsin, USA

G Gozukara, Y Zhang, AE Hartemink - Geoderma, 2021 - Elsevier
Many soils have two or more parent materials. It is not always possible to distinguish these
materials in a soil pit or in the field. Here we present a study in the Driftless Area of …

Assessing profile uniformity of soils from weathered clastic sedimentary rocks in southwest China

J Hu, Z Huang, S Li, B Liu, E Ci - Catena, 2023 - Elsevier
The 41 pedons from weathered clastic sedimentary rocks were selected to assess the parent
material and soil profile uniformity. The results can help to divide argillic horizon and identify …