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International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad Sharma, P. C., Fagodiya, R. K. and Jat, H. S. 2021. Nitrogen management in conservation agriculture-based cropping systems. Indian J. Fert. 17(11): 1166-1179 Six, J., Bossuyt, H., Degryze, S. and Denef, K. 2004. A history of research on the link between (micro) aggregates, soil biota, and soil organic matter dynamics. Soil Till. Res. 79: 7-31 Effect of different tillage systems on soil physical and chemical properties Tillage systems CT1 CT2 CT3 CT4 CT5 CT6 S.Em ± CD (0.05) Soil aggregate stability (%) 63.2 62.7 63.0 63.1 61.2 60.6 0.18 0.56 MWHC (%) 53.9 53.8 53.7 54.0 50.6 48.0 0.13 0.38 SOC (g kg -1 ) at 0-15cm depth 8.84 8.68 8.76 8.49 6.31 5.46 0.08 0.25 SOC (g kg -1 ) at 15-30cm depth 5.27 5.30 5.19 5.22 6.16 5.45 0.05 0.16 Available N (kg ha -1 ) at 0-15cm depth Available N (kg ha -1 ) at 15-30cm depth Available P (kg ha -1 ) at 0-15cm depth Available P (kg ha -1 ) at 15-30cm depth Available K (kg ha -1 ) at 0-15cm depth Available K (kg ha -1 ) at 15-30cm depth 290.8 286.9 287.5 281.5 270.8 254.2 2.09 6.17 198.8 199.6 199.9 199.0 223.6 207.9 0.61 1.80 41.9 40.3 41.3 40.5 38.4 28.0 0.57 1.68 26.3 26.2 27.1 26.6 31.4 26.8 0.18 0.52 449.5 447.7 448.8 445.8 426.1 376.5 3.54 10.45 384.2 384.0 385.3 383.7 403.7 365.6 0.82 2.43 Resource conservation and rainfed agriculture 588 | Page
International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad T4a-11R-1127 Co-Application of Biochar and Inorganic Fertilizer Improves Soil Fertility and Crop Productivity in Maize-Groundnut Cropping System in Semi-Arid Alfisols K. C. Nataraja 1 , S. N. Malleswari Sadhineni 1 , G. Narayana Swamy 1 , Ch. Srinivasarao 2 , D. Balaguraviah 1 , M. V. S. Naidu 1 , Y. Reddi Ramu, 1 P. Lavanya Kumari 1 and T. Giridhara Krishna 1 1 Acharya N.G. Ranga Agricultural University, Andhra Pradesh 2 ICAR-National Academy Agricultural Research Management, Hyderabad - 500030, Telangana The man induced climate change, posed an adverse impact on soil health and crop productivity. It is crucial to maintain threshold level of organic matter in soil to perform its agricultural production and environmental functions (Srinivasarao et al., 2014). In this context, there is a considerable interest in the concept of applying biochar to soil as long term sink for carbon thereby mitigating climate change. In addition to being an important emission neutral technology, biochar is a multifunctional option. Hence, the addition of biochar is complementary to diverse land uses in semi-arid agro ecosystem (Lal et al., 2018). In light of the above scenario, co application of biochar and inorganic fertilizer and its effect on crop growth was evaluated in maize-groundnut cropping system under hot, semi-arid Alfisols of southern Andhra Pradesh, India. Methodology Field experiment was conducted in split-split plot design with fixed plot for both Kharif and Rabi during 2018 to 2020 at Agricultural Research Station, Ananthapuramu under Acharya N.G. Ranga Agricultural University, Andhra Pradesh, India. 75 % Recommended dose of inorganic fertilizer (RDF) as (F1) and 100% as (F2). Pigeonpea biochar (B1) and cotton biochar (B2) and their respective crop residues as (B3 and B4) were treated as sub plots. Biochar and their respective crop residues were applied at the rate 0 t ha -1 , 2 t ha -1 and 4 t ha -1 as sub - sub plot treatments. All the treatments were applied with common basal dose of RDF for maize during kharif and for groundnut during rabi. Sub plot treatment with 0 t ha -1 of fertilizer was considered as fertilized control. Biochar application was only to Kharif maize in both the years and its residual effect was studied on groundnut during Rabi. Results The impact of combined application of biochar along with RDF in maize-groundnut cropping system under hot, semi-arid Alfisols is presented in table 1. The pooled statistically analyzed data reveals that, highest plant height at harvest was recorded in maize with the application of 100% RDF + pigeonpea biochar @ 4 t ha -1 followed by 2 t ha -1 and fertilized control treatments. The carry over effect of biochar on Rabi groundnut was also noticed the similar trend. Similarly, the conjunctive use of 100% RDF + pigeonpea biochar @ 4 t ha -1 recorded 589 | Page Resource conservation and rainfed agriculture
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Extended Summaries 22-24 December,
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Citation Rama Rao, C.A., Srinivasa
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Resilience through land and water m
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International Conference on Reimagi
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Theme- 2 Ecosystem based approaches
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