While global efforts to operationalize soil spectroscopy are progressing, cooperation is needed to fully leverage its potential for generating digital soil information to support sustainable soil management worldwide. The Global Soil Laboratory Network's soil spectroscopy initiative (GLOSOLAN-Spec), led by the Food and Agriculture Organization of the United Nations (FAO) through its Global Soil Partnership (GSP), is dedicated to the further development and adoption of soil spectroscopy by fostering international collaboration via a scientific community of practice to produce accurate and reliable soil information for sustainable soil management and decision-making. To support this effort, we, a global consortium of soil scientists under the auspices of the International Union of Soil Sciences (IUSS) and GLOSOLAN-Spec, aim to address seven key challenges hindering the adoption of soil spectroscopy worldwide. Here, we offer perspectives on what is needed to advance soil spectroscopy as a routine soil analysis method, emphasizing its potential to generate new and reliable spatial and temporal soil data.

College of Environmental and Resource Sciences Zhejiang University Hangzhou 310058 China

Data Science Department BUCHI Labortechnik AG 9230 Flawil Switzerland

Department of Agrochemistry and Environment University Miguel Hernandez of Elche 03202 Elche Spain

Department of Biological Systems Engineering University of Nebraska Lincoln Lincoln NE 68583 USA

Department of Environment Faculty of Bioscience Engineering Ghent University 9000 Ghent Belgium

Department of Soil and Environment Swedish University of Agriculture Sciences 53231 Skara Sweden

Department of Soil Science and Soil Protection Czech University of Life Sciences Prague Prague 16500 Czech Republic

Department of Soil Science Luiz de Queiroz College of Agriculture University of São Paulo Piracicaba 13 418 900 Brazil

Food and Agriculture Organization of the United Nations 00153 Rome Italy

Helmholtz Centre for Geosciences Research Remote Sensing and Geoinformatics Section 14473 Potsdam Germany

Imperial College London Imperial Business School London SW7 2AZ UK

Leibniz University Hannover Institute of Earth System Sciences Department of Soil Sciences 30419 Hannover Germany

LISAH University Montpellier IRD INRAE Institut Agro AgroParisTech 34060 Montpellier France

Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing 210008 China

New South Wales Department of Climate Change Energy the Environment and Water Parramatta NSW 2150 Australia

Porter School of Environment and Earth Science Faculty of Exact Science Tel Aviv University Tel Aviv 699780 Israel

School of Environmental Sciences University of Guelph Guelph ON N1G 2W1 Canada

Soil and Land Health World Agroforestry Nairobi 00 100GPO Kenya

Soil and Landscape Science Curtin University Perth WA 6102 Australia

State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Nanjing 210008 China

Sydney Institute of Agriculture and School of Life and Environmental Sciences The University of Sydney Sydney NSW 2006 Australia

The James Hutton Institute Aberdeen AB15 8QH Scotland

University of the Chinese Academy of Sciences Beijing 100049 China

USDA ARS Range Management Research Unit Las Cruces NM 88003 USA

USDA NRCS National Soil Survey Center Tangent OR 79389 USA

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Frontiers in earth observation for global soil properties assessment linked to environmental and socio-economic factors