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Field spectrometer to measure percent ground coverage and leaf area index of agriculture crops

Brach E. J., Desjardins R. L., Lord Daniel et Dubé P. A.. (1981). Field spectrometer to measure percent ground coverage and leaf area index of agriculture crops. Agriculture Canada, Ottawa, Ontario.

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Résumé

Measurement of percent ground cover (PGC) and leaf area index (LAI) are required for crop modelling, yield estimation 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:Rapport
Date:1981
Nombre de pages:8
Organisation:Agriculture Canada, Ottawa, Ontario
Sujets:Sciences naturelles et génie
Sciences naturelles et génie > Sciences appliquées
Sciences naturelles et génie > Sciences appliquées > Agronomie
Département, module, service et unité de recherche:Départements et modules > Département des sciences fondamentales > Modules des sciences fondamentales
Mots-clés:spectrometer, percent ground coverage, PGC, leaf area index, LAI, agriculture crop
Déposé le:23 févr. 2016 01:09
Dernière modification:23 févr. 2016 01:09
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