In-situ spectroscopic characterization of soil properties for precision agriculture**

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SoilReader®, a precision agriculture equipment manufacturing company, is revolutionizing soil analysis techniques with highly precise and in-situ measurements of multiple soil constituents at depths in real-time utilizing the principle of soil spectroscopy. SoilReader, a soil spectrometer attached to a disc, records real-time soil spectral response at multiple depths (within top 9-in) as it moves through the field with high-resolution analysis (~3500 samples/acre) of multiple (9) soil constituents providing solutions for fast and non-destructive soil characterization for precision management of crop inputs. However, during each rotation of the SoilReader disc, the spectrometer records spectral response continuously both in dark environment within the soil and the bright environment outside of soil. This creates difficulty in processing the soil spectra and the prediction of soil properties. The joint venture between the University of Guelph and SoilReader aims to develop strategies to separate the spectra and improve prediction of soil properties. More specific questions that this project aims to answer are 1) how well spectroscopic measurements can predict multiple soil properties in the field (in-situ) conditions? and 2) how can we develop a multivariate statistical model to process above/below ground spectral responses for improved prediction of soil properties? The research, the technique, and the information generated through this project will provide an inexpensive means for soil characterization in short time for the growers, service providers, researchers, and other data users for precision agriculture services. Additionally, the mathematical model developed from this project will guide SoilReader to develop and strengthen the analytical services and will improve the equipment in future to support better crop growth and development from the optimized use of agronomic input while improving environmental sustainability.**