F PAR 1222 01914 NDVI

Variation in canopy optical properties, architecture as well as background spectral reflectance could affect f PAR - NDVI relation, with background spectral properties producing a large effect.

It was observed that APAR was linearly related to NDVI and curvulinearly to LAI (Leaf Area Index) approaching asymptotically value of LAI, where virtually all incident short wave radiation observed by crop canopy. Fig. 8 illustrates APAR map of wheat crop derived by processing of IRS- WiFS data from a case study of part of U.P. and U.A., India (ASD, 2003).

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