Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges &
Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
of the rabi crops was converted to rice equivalent yields and comparison was done amongst
the rabi crops (toria, niger and pea).
Results
The long duration rice variety (4-6.5 t ha -1 ) gives better yield than the medium duration rice
variety (4-5.5 t ha -1 ). The yield of each rabi crops significantly decreased when sown after
Gitesh (long duration rice variety) as compared to sowing of the same rabi crops after
Kalanklata (medium duration variety). Though, the types of irrigation didn’t significantly affect
crop yield, but 50 % water could be saved with sprinkler irrigation as compared to flood
irrigation. The system yield of the cropping sequence reduces when sowing was delayed from
1 st of December to 15 th Dec with flood and sprinkler irrigation, respectively. The sowing date
had an impact in the yield and yield attributes of all the rabi crops irrespective of the irrigation
treatments and the sprinkler irrigation gives better yield than the flooded irrigation for all the
rabi crops. The system yield comes to be higher in case of all the rabi crops preceded by
medium duration kanaklata variety, which indicates that the sowing date had an impact in the
rabi crops irrespective of the irrigation types applied. The irrigation water used for rabi crops
(preceded by medium duration rice variety) is 14% more than the water used for rabi crops
(preceded by long duration rice variety). The difference in irrigation water used for the rabi
crops in both the different varieties of preceded rice varieties is only due to the dry spells
occurred during the crop periods. Though the irrigation water applied is at par in both the
sprinkler and flooded irrigation, the time consumption (thus, more labour intensive) is more in
case of flooded irrigation. The lowland areas can be used for growing of the rabi crops with
life-saving irrigation depending on the dry spells occurred after the medium and long duration
crops rather than keeping it fallow (general tradition of the farmers) in such land situations.
The interaction effect of sowing date and irrigation types on the growth and yield attributing
characters and yield of the crops are presented.
System yield: The system yields of the different cropping sequences (rice-toria, rice-niger and
rice-pea) were calculated for each year individually and pooled analysis was done. The study
revealed that cropping sequence of medium duration rice (Kanaklata) – Pea shows the highest
system yield of 88.43 q ha -1 and the lowest system yield (58.32 q ha -1 ) was observed in cropping
sequence of Long duration rice (Gitesh) – Niger amongst all the cropping sequences
respectively.
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