Accuracy of estimating the leaf area index from vegetation indices derived from crop reflectance characteristics, a simulation study

Abstract The canopy radiation model EXTRAD was used to quantify the accuracy of leaf area index (LAI) estimations from vegetation indices (Vis), derived from green and infra-red crop reflectance. The Vis were the infra-red/ green (IR/GR) ratio, the normalized difference vegetation index (NDVI), the perpendicular vegetation index (PVI) and the weighted difference vegetation index (WDVI). The accuracy of LAI estimation was calculated in relation to variation in leaf green and infra-red colour, leaf angle distribution, soil background and illumination conditions. The theoretical calculations were supported with a field experiment on sugar-beet. Variation in illumination conditions and soil background gave relatively small estimation errors with all four Vis. The largest estimation errors resulted from variation in leaf colour and leaf angle distribution. With variation in green leaf colour, the estimation errors were lowest with the WDVI. With variation in leaf angle distribution, the errors were lowest with...

[1]  C. Tucker.  Red and photographic infrared linear combinations for monitoring vegetation , 1979 .

[2]  A. J. Richardsons,et al.  DISTINGUISHING VEGETATION FROM SOIL BACKGROUND INFORMATION , 1977 .

[3]  A.R.G. Lang,et al.  Leaf orientation of a cotton plant , 1973 .

[4]  J. Clevers.  Application of a weighted infrared-red vegetation index for estimating leaf Area Index by Correcting for Soil Moisture , 1989 .

[5]  J. Clevers.  The Derivation of a Simplified Reflectance Model for the Estimation of Leaf Area Index , 1988 .

[6]  R. Loomis,et al.  Productivity and the Morphology of Crop Stands: Patterns With Leaves , 2015 .

[7]  W. Verhoef.  Light scattering by leaf layers with application to canopy reflectance modelling: The SAIL model , 1984 .

[8]  J. Goudriaan,et al.  Crop Micrometeorology: A Simulation Study , 1977 .

[9]  R. Jackson,et al.  Soil spectral effects on 4-space vegetation discrimination , 1984 .

[10]  Wyn L. Price,et al.  A Controlled Random Search Procedure for Global Optimisation , 1977, Comput. J..

[11]  J. A. Schell,et al.  Monitoring vegetation systems in the great plains with ERTS , 1973 .

[12]  Theoretical estimates of sensitivity in some vegetation indices to variation in the canopy condition , 1989 .

[13]  O. Klepper,et al.  A model of carbon flows in relation to macrobenthic food supply in the Oosterschelde estuary (S.W. Netherlands) , 1989 .

[14]  R. Jackson,et al.  Spectral response of a plant canopy with different soil backgrounds , 1985 .

[15]  C. T. Wit.  Photosynthesis of leaf canopies , 1965 .

[16]  C. Jordan.  Derivation of leaf-area index from quality of light on the forest floor , 1969 .

[17]  N. Bunnik.  The multispectral reflectance of shortwave radiation by agricultural crops in relation with their morphological and optical properties , 1978 .

[18]  J. D. Dulk.  The interpretation of remote sensing : a feasibility study , 1989 .