Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges &
Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
obtaining stationary yield data. Mann Kendall test, a non-parametric test was employed to find
the trend in DSI and the significance in the trend was detected by two-tailed test at 95%
probability levels. Pearson’s correlation coefficients of de-trended sorghum yield with DSI
were worked out for all selected districts of Telangana.
Results
The DSI value ranged between 3.6 and 8.2 in different districts of Telangana state. The spatial
distribution of average DSI over the period 1991–2020 across the districts indicate that, it was
highest (8.2) in Jogulamba Gadwal district followed by Nalgonda (8.10) and Hyderabad (8.01)
while the lowest DSI was observed in Bhadradri Kothagudam (3.6) followed by J. Bhupalpally
(3.9), Mancherial and Komaram Bheem (4.0) (Fig. 1a). Mann-Kendall trend analysis showed
that the DSI is declining in all the districts of Telangana. However, significant decreasing trend
(at 5% level) was noticed in Adilabad, Hyderabad, Kamareddy, Karimnagar, Khammam,
Nizamabad, Siddipet, Suryapet and Yadagiri Bhuvagiri districts (Fig. 1b). This indicate that
the occurrence of dry spells and its duration has reduced during the study period. The Pearson
correlation analysis indicate that around 41 per cent area under sorghum in Telangana state is
having significant negative correlation with DSI.
Conclusion
In the present study Dry Spell Index was computed to find the spatial distribution, trend and
influence of dry spells during kharif (June-Sep) season on sorghum productivity over
Telangana state at district level. Results indicate that, the highest (8.2) DSI was noticed in
Jogulamba Gadwal district and the lowest DSI in Bhadradri Kothagudam (3.6) district.
Significant decreasing trend (at 5% level) in DSI was noticed in Adilabad, Hyderabad,
Kamareddy, Karimnagar, Khammam, Nizamabad, Siddipet, Suryapet and Yadagiri Bhuvagiri
districts. Significant negative relationship was observed in 41 per cent sorghum growing area
of Telangana district. Further study is required to find the dry spell occurrence with in the crop
growing period or different phenological stages of the crop using DSI to assess the influence
on crop yield.
References
AAP, 2021. Agriculture Action Plan 2020-21. Department of Agriculture, government of
Telangana, Hyderabad, 130p.
Bal S., Sandeep V.M, Vijaya Kumar P, Subba Rao A.V.M., Pramod V.P, Manikandan N,
Srinivasa Rao, Singh N.P. and Bhaskar S. (2022). Assessing impact of dry spells on
the principal rainfed crops in major dryland regions of India. Agric. Meteorol., 313,
108768 https://doi.org/10.1016/j.agrformet.2021.108768
Emerging approaches (RS, AI, ML, Drones etc) for crop management &assessment
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