TY  - JOUR
A1  - Erler, Alexander
A1  - Riebe, Daniel
A1  - Beitz, Toralf
A1  - Löhmannsröben, Hans-Gerd
A1  - Leenen, Mathias
A1  - Pätzold, Stefan
A1  - Ostermann, Markus
A1  - Wójcik, Michał
T1  - Mobile laser-induced breakdown spectroscopy for future application in precision agriculture
T2  - Sensors
N2  - In precision agriculture, the estimation of soil parameters via sensors and the creation of nutrient maps are a prerequisite for farmers to take targeted measures such as spatially resolved fertilization. In this work, 68 soil samples uniformly distributed over a field near Bonn are investigated using laser-induced breakdown spectroscopy (LIBS). These investigations include the determination of the total contents of macro- and micronutrients as well as further soil parameters such as soil pH, soil organic matter (SOM) content, and soil texture. The applied LIBS instruments are a handheld and a platform spectrometer, which potentially allows for the single-point measurement and scanning of whole fields, respectively. Their results are compared with a high-resolution lab spectrometer. The prediction of soil parameters was based on multivariate methods. Different feature selection methods and regression methods like PLS, PCR, SVM, Lasso, and Gaussian processes were tested and compared. While good predictions were obtained for Ca, Mg, P, Mn, Cu, and silt content, excellent predictions were obtained for K, Fe, and clay content. The comparison of the three different spectrometers showed that although the lab spectrometer gives the best results, measurements with both field spectrometers also yield good results. This allows for a method transfer to the in-field measurements.
KW  - LIBS
KW  - precision agriculture
KW  - soil
KW  - multivariate methods
KW  - feature selection
Y1  - 2023
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/64323
SN  - 1424-8220
VL  - 23
IS  - 16
PB  - MDPI
CY  - Basel
ER  -