Using NOAA satellite Advanced Very High Resolution Radiometer (AVHRR) data over the Ludhiana district (Punjab, India) observing 94-98 per cent of the area sown with wheat during the 1986-87 Rabi crop season, this article presents first an analysis of a correlation coefficients matrix for the different crop growth stages Normalized Difference Vegetation Index (NDVI) and Ratio Vegetation Index (RVI) data sets. Though each stage of crop growth is related to its previous as well as its following crop growth stage, the structure of the relation keeps changing over the crop growth cycle. This article discusses the observed typical scatterogram structures such as bowl shape with horizontal cutoff, horizontal cut-offs at upper portions etc. together with the collateral information on histogram parameters for the data sets used in the scatterograms. The paper also discusses the differential behaviour between NDVI and RVI scatterograms for different crop growth stages.