NOAA/AVHRR vegetation indices and agriculture-meteorology processes

Details NOAA/AVHRR vegetation indices and agriculture-meteorology processes NOAA/AVHRR vegetation indices and agriculture-meteorology processes

Jul 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992adspr..12...87g&link_type=abstract

Advances in Space Research, Volume 12, Issue 7, p. 87-90.

Physics

Scientific paper

Enzymes controlled biochemical reactions in photosynthesis and respiration processes are affected by temperature making Growing Degree Days (GDDs) an important crop growth agromet parameter. NOAA/AVHRR Ratio Vegetation Index (RVI) and Normalized Difference Vegetation Index (NDVI) provide integrated aspect of non-linear crop-growth processes. This paper describes the inter-relationships between temporal profiles of air temperature GDDs and RVI/NDVI over Ludhiana district wherein the 94.9% of agriculture area has been under wheat. The Regression Coefficients (RC) for RVI have been lower than that for NDVI in case of mean air temperature GDDs and are significant at 99% confidence level. Similar relationship has been also observed for maximum air temperature GDDs except that regression with RVI is significant at 98% confidence level. Such relationship with minimum air temperature GDDs is significant at 99% confidence level once the regression is restricted to mid of Milking-Dough stage.

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