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An assessment is made about effect of NDVI on productivity of different major crops grown in study area under Telugu Ganga Project in Andhra Pradesh during 1997 and 2018. Remote sensing based area of major crops in kharif, rabi in 1997 and 2018 were analyzed. In 1997, total area ranged from 1875 ha (pulses) to 78688 ha (paddy), while groundnut area was 35181 ha, followed by jowar (24707 ha), cotton (17660 ha), sunflower (14601 ha), chillies (13442 ha), sugarcane (8673 ha) and bajra (3199 ha). In 2018, the total area ranged from 1163 ha (bajra) to 180351 ha (paddy), while jowar had an area of 24218 ha, followed by chillies (18420 ha), groundnut (16152 ha), sunflower (16100 ha), cotton (14942 ha), pulses (10032 ha) and sugarcane (4113 ha). Using Remote sensing and GIS based NDVI, we assessed changes in crop area in kharif and rabi 1997 and 2018.The areas of major crops are classified in to Very good, good, and Average categories based on NDVI values. Effects of NDVI on paddy yield were assessed using regression models of yield through NDVI. There was a positive and significant increase in NDVI in 2018 for unit change in NDVI in 1997 with rate of change and coefficient of determination (R 2 ) of 0.433. The pooled NDVI ranged from 0.324-0.616 in 1997, while it ranged from 0.4750.811 in 2018 and paddy yield ranged from 3330-6946 kg/ha in entire TGP. The model gave significant rate of change of NDVI and R 2 of 0.786 for predicting yield in entire TGP command. The findings are useful to planners and researchers for improvement in crop area and better management of resources for attaining higher yields of paddy and other crops under TGP in Andhra Pradesh.

The Study of NDVI Effect on Yield of Major Crops under Telugu Ganga Project Command in Andhra Pradesh