Author(s): TAVARES, O. C. H.; TAVARES, T. R.; PINHEIRO JUNIOR, C. R.; SILVA, L. M. da; WADT, P. G. S.; PEREIRA, M. G.

Summary: The southwestern region of the Amazon has great environmental variability, presents a great complexity of pedoenvironments due to its rich variability of geological and geomorphological environments, as well as for being a transition region with other two Brazilian biomes. In this study, the use of pedometric tools (the Algorithms for Quantitative Pedology (AQP) R package and diffuse reflectance spectroscopy) was evaluated for the characterization of 15 soil profiles in southwestern Amazon. The AQP statistical package-which evaluates the soil in-depth based on slicing functions-indicated a wide range of variation in soil attributes, especially in the superficial horizons. In addition, the results obtained in the similarity analysis corroborated with the description of physical, chemical components and oxide contents in-depth, aiding the classification of soil profiles. The in-depth characterization of visible-near infrared spectra allowed inference of the pedogenetic processes of some profiles, setting precedents for future work aiming to establish analytical strategies for soil classification in southwestern Amazon based on spectral data.

Publication year: 2022

Types of publication: Journal article

Unit: Embrapa Acre

Keywords: AQP R package, Amazonia, Clasificación de suelos, Classificação do Solo, Diffuse reflectance spectroscopy, Espectroscopia no infravermelho próximo, Espectroscopía del infrarrojo cercano, Near-infrared spectroscopy, Pedometrics, Soil attributes, Soil classification, Soil-depth functions