Variability in Length of Crop Growing Period Causing Agricultural Vulnerability in India
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Authors
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Kaushalya Ramachandran
ICAR-Central Research Institute for Dryland Agriculture, Hyderabad 500 059, India
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Shubhasmita S
ICAR-Central Research Institute for Dryland Agriculture, Hyderabad 500 059, India
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A Haritha
ICAR-Central Research Institute for Dryland Agriculture, Hyderabad 500 059, India
Abstract
Satellite-data based Normalized Difference Vegetation Index (NDVI) canindicate state of agriculture, crop vigour and hence can also be used to assess agricultural
vulnerability. Analysis of trends in NDVI for a given region can indicate the factors
that cause variability and the drivers that impart vulnerability to agriculture. One
such driver is variability in Length-of-Crop-Growing – Period (LGP). A methodology
was developed to determine LGP from time-series NDVI datasets from Start-of-Season
or greening-up phase to End-of-Season or drying-up phase. Public domain data like
NOAA-AVHRR based GIMMS data product (1982-2006) and MODIS-TERRA data (2000-
2013) were used to analyse variations in LGP contributing to agricultural vulnerability
in various agro-ecological sub-regions (AESR) in Peninsular India. Study carried out
at ICAR-CRIDA under NICRA indicates the variable trends in LGP and its impact on
agricultural production leading to agricultural vulnerability in India.
Key words: LGP, NDVI, agricultural vulnerability, crop phenology, AESR, rainfed
agriculture.
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