Book of Extended summaries ISDA

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities
during 22-24, December 2022 at ICAR-CRIDA, Hyderabad
At the end of 8 th year of experimentation, the observations were recorded for green biomass and
dry matter yield of black gram at flowering for green manuring. The conventional tillage (CT)
recorded highest mean green biomass yield (39.54 q ha -1 ) and dry matter yield (9.56 q ha -1 )
followed by reduced tillage (38.13 and 7.85 q ha -1 ) and zero tillage (29.70 and 6.76 q ha -1 )
treatments. The rabi sorghum recorded significantly highest grain (15.18 q ha -1 ) and stover
(37.98 q ha -1 ) yields in reduced tillage main treatment (S2) followed by conventional tillage
(15.08) and zero tillage (14.76). However, the treatment differences were non-significant. The
highest returns, B:C ratio and relative water use efficiency (RWUE) were Rs. 60322/ha, 2.59 and
4.12 kg ha -1 mm -1 respectively in rabi sorghum.
In residue management sub-treatment, the grain (16.59 q/ha) and straw yield (41.04 q/ha) of rabi
sorghum was recorded highest in black gram –green manuring (S2) treatments followed by kharif
fallow (S1) and black gram grain (S3) treatment. The rabi sorghum recorded significantly highest
net monetary returns, B:C ratio and relative water use efficiency (RWUE) Rs. 69385/ha, 2.83
and 3.67 kg ha -1 mm -1 respectively in black gram –green manuring (S2) treatments followed by
kharif fallow (S1) and black gram grain (S3) treatment.
T4a-24P- 1338
Effect of Tillage Practices and Mulching on Rabi Sorghum Crop under Rainfed Condition
K. Arun Kumar*, T. Bagavata Priya, S. Isha Parveen, D. Lakshmi kalyani, R.
Narasimhulu, Y. S. Sathish Kumar and H Manjunath
Regional Agricultural Research Station, Acharya N. G. Ranga Agricultural University,
Nandyal-518502
*k. arunkumar@angrau.ac.in
Soil water availability in water-limited ecosystems has been recognized as a key factor
influencing plant production. The present situation in India demands conservation of every drop
of water on land surface to increase biomass production to support livelihood. Suitable tillage
practices that reduces cost of cultivation; increases income, reduces hazardous effects and
increases water use efficiency of sorghum need to be adopted for conservation of rainwater, top
fertile soil and nutrients that stabilizes and/or improves the food production in the region. At
present conditions, both primary and secondary tillage operations are being carried-out which not
only increases cost of cultivation but also induces soil and water losses. By avoiding these
problems, rotary strip tillage has been introduced which gave the best crop residue management
by decomposing the leftover crop residues in the field and turn in increase the organic matter
content which intern increases water holding capacity of the soil.
614 | Page Resource conservation and rainfed agriculture