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Field spectrometer to measure percent ground coverage and leaf area index of agriculture crops [remote sensing]

Brach E. J., Desjardins R. L., Lord Daniel et Dubé P. A.. Field spectrometer to measure percent ground coverage and leaf area index of agriculture crops [remote sensing]. Dans : Colloques de l'INRA (France)

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Résumé

Measurement of percent ground cover (PGC) and leaf area index (LAI) are required for crop modelling, yield estimati-on and for ground truth data in remote sensing studies. An instrument which traverses on a track above a crop and continuously measures the ratio of incident and reflected radiation at various wavelengths was developed and tested. Spectral irradiance and reflectance measurements were made at four wavelengths (647.8 , 675.5 , 739.9 , 790.4 nm) at eight stages of growth of wheat and barley for three crop densities. Data provided information on the relations between spectral properties at selected wavelength and leaf area expansion at different growth stages. The spectral data were highly correlated with leaf area index measurements.

Type de document:Matériel de conférence (Non spécifié)
Sujets:Sciences naturelles et génie
Sciences naturelles et génie > Sciences naturelles
Sciences naturelles et génie > Sciences naturelles > Biologie et autres sciences connexes
Département, module, service et unité de recherche:Départements et modules > Département des sciences fondamentales > Modules des sciences fondamentales
Mots-clés:LAI, leaf area index, spectrometer, reflectance, percent ground cover, PGC
Déposé le:08 avr. 2016 01:40
Dernière modification:08 avr. 2016 01:40
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