Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities
during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
of fertilizer doses (RDF) in RBD. For Rabi crops, sunflower and chickpea were raised in
respective main plots as subplots duly imposing fertilizer doses as treatment schedule. STCR
DOSES were calculated based on soil test results of kharif post harvest soil available NPK with
25 q targeted yields by using STCR equations. Sunflower equivalent yields, cost of cultivation
and net returns were calculated by using standard procedures. The data on various parameters of
crop was statistically analyzed by following ANOVA.
Results
Results on Rabi Sunflower equivalent yields indicated that seed yield was significantly
influenced by nutrient management practices and cropping system. Among nutrient management
practices tested, 100% STCR recorded significantly higher sunflower equivalent yields (1799
kg/ha) followed by 100% RDF treatment. Significantly lower sunflower equivalent yields were
recorded with 50 % STCR dose of fertilizers were applied. Similarly, Soybean-sunflower
cropping system recorded significantly higher sunflower equivalent yields (2072 kg/ha) which
was on par with Maize-sunflower cropping system (2057 kh/ha). cotton–Sunflower cropping
system recorded significantly lower sunflower equivalent yields (914 kg/ha) among four
cropping systems tried. Interaction effect between nutrient management practices and cropping
systems was significant. Sunflower being an exhaustive crop requires higher dose of fertilizer in
Rabi season. Hence crop responded for 100% STCR treatment and equation applied for targeted
yield of 25q. Shanwaz et.al., 2015 also reported the positive results on sunflower yields with
STCR approach which was ageing the present results. Sheoron et al., 2017 reported that
significant response in yield was observed inclusion of farmyard manure (FYM) with the
recommended NPK in the cropping system indicating 6.2% -7.0% grain in system productivity
over the existing recommendations. Results on system equivalent yields and economics shows
that, Maize-sunflower cropping system recorded higher sunflower equivalent yields (3117 kg/ha)
and highest net returns (Rs.119313/- ha), among four cropping systems tested in study. However
soybean sunflower cropping system recorded higher cost-benefit (C:B) ratio (1:3.0)
Conclusion
It is concluded that Maize- sunflower cropping system recorded significantly higher sunflower
yield followed by soybean- sunflower cropping system. Cotton- sunflower cropping system
recorded significantly lower sunflower yields when compared with rest of three cropping
systems
Sustainable soil management for resilient rainfed agro-ecosystem: conservation agriculture, organic farming,
INM, soil-microorganisms-plant interactions
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