Soil Spectroscopy in the Africa Soil Information Service Getting the best out of light [WG1] Soil Monitoring for Mankind and Environment Safety 20th World Congress of Soil Science, 8 – 13 June 2014, Jeju, Korea Keith D Shepherd, Land Health Decisions World Agroforestry Centre (ICRAF), Nairobi, Kenya Earth Institute, Columbia University (adjunct)
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Soil Spectroscopy in the Africa Soil Information Service: Getting the best out of light
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Soil Spectroscopy in the Africa Soil Information Service
Getting the best out of light
[WG1] Soil Monitoring for Mankind and Environment Safety
20th World Congress of Soil Science, 8 – 13 June 2014, Jeju, Korea
Keith D Shepherd, Land Health DecisionsWorld Agroforestry Centre (ICRAF), Nairobi, Kenya
Earth Institute, Columbia University (adjunct)
Surveillance Science• Measure frequency of problems and associated risk factors in
populations using statistical sampling designs & standardized measurement protocols
UNEP. 2012. Land Health Surveillance: An Evidence-Based Approach to Land Ecosystem Management. Illustrated with a Case Study in the West Africa Sahel. United Nations Environment Programme, Nairobi.http://www.unep.org/dewa/Portals/67/pdf/LHS_Report_lowres.pdf
Shepherd KD and Walsh MG (2007) Infrared spectroscopy—enabling an evidence-based diagnostic surveillance approach to agricultural and environmental management in developing countries. Journal of Near Infrared Spectroscopy 15: 1-19.
remote sensingPrevalence, Risk factors, Digital mapping
Sentinel sites Randomized sampling
schemes
Data & soil library management
Barcoding
Soil archiving system
1.2 km shelving holds over 40 t of soil
Shepherd Keith
Spectral shape relates to basic soil properties
• Mineral composition• Iron oxides• Organic matter• Water (hydration,
hygroscopic, free)• Carbonates• Soluble salts• Particle size distribution
Functional properties
Field spectroscopy
Shepherd KD and Walsh MG. (2002) Development of reflectance spectral libraries for characterization of soil properties. Soil Science Society of America Journal 66:988-998.
Brown D, Shepherd KD, Walsh MG (2006). Global soil characterization using a VNIR diffuse reflectance library and boosted regression trees. Geoderma 132:273–290.
Shepherd KD and Walsh MG (2007) Infrared spectroscopy—enabling an evidence-based diagnostic surveillance approach to agricultural and environmental management in developing countries. Journal of Near Infrared Spectroscopy 15: 1-19.
Terhoeven-Urselmans T, Vagen T-G, Spaargaren O, Shepherd KD. 2010. Prediction of soil fertility properties from a globally distributed soil mid-infrared spectral library. Soil Sci. Soc. Am. J. 74:1792–1799