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International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad highest hundred grain weight (g) or test weight of maize during Kharif and highest 100 kernel weight (g) during rabi with application of pigeonpea biochar @ 4 t ha -1 followed 2 t ha -1 and fertilized control. However, the biomass yield with respect Kharif grown maize and residual effect of biochar on rabi grown groundnut was also followed the similar trend wherein, pigeonpea biochar @ 4 t ha -1 yielded highest stover yield in maize and highest haulm yield in groundnut compared to lowest in fertilized control. Besides, available nutrient status in soil improved. This might be due to positive effect of biochar along with inorganic fertilizer influenced the soil pH, WHC, increased soil available N, P, K and balanced nutrient uptake. Further, biochar at higher dose effectively promoted nutrient absorption by crop eventually, more synchronization of nutrients to crop growth. The results were in agreement with those as reported by Feng et al. (2021). Conclusion Integrated application of pigeonpea biochar @ 4 t ha -1 along with RDF for maize and residual effect of biochar in rabi influenced the soil physico chemical properties and soil fertility, eventually increased crop growth. Thus, co application of biochar and inorganic fertilizer not only effective in improving soil fertility but also improves crop productivity in semi-arid Alfisols Effect of co application of biochar and inorganic fertilizer on the growth attributes of Treatment Type of biochar / Crop residue maize-groundnut cropping sequence in semi-arid Alfisols. Plant height (cm) at harvest Kharif maize 100 grain weight (g) Stover yield (kg ha -1 ) Plant height (cm) at harvest Rabi groundnut 100 kernel weight (g) Haulm yield (kg ha -1 ) B 1 (Pigeonpea ) 203.2 31.62 9542 32.5 44.8 3796 B 2 (Cotton) 202.0 30.85 9405 32.2 44.4 3750 B 3 (Pigeonpea crop residue) 200.3 30.14 9236 31.7 43.3 3691 B 4 (Cotton residue) 198.3 29.59 9095 31.4 43.0 3576 SEm± 1.76 0.32 100.1 0.39 0.14 35.40 LSD (P = 0.05) NS 0.92 292.1 NS 0.40 103.3 Level of biochar / Crop residue S 1 (0 t ha -1 ) 188.3 29.70 8741 29.5 40.9 3187 S 2 (2 t ha -1 ) 205.1 30.58 9439 32.4 44.7 3898 S 3 (4 t ha -1 ) 209.4 31.36 9778 33.9 46.1 4024 SEm± 1.52 0.24 72.7 0.33 0.10 29.27 LSD (P = 0.05) 4.29 0.67 205.4 0.94 0.28 82.7 RDF Fertilizer level F 1 (75 %) 199.3 30.40 9080 31.1 43.6 3680 Resource conservation and rainfed agriculture 590 | Page
International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad F 2 (100 %) 202.6 30.70 9559 32.8 44.11 3726 SEm± 1.67 0.29 55.1 0.20 0.12 30.98 LSD (P = 0.05) NS NS 216.3 0.77 NS NS References Srinivasarao, Ch., Rattan Lal, Sumanta Kundu, Prasad Babu, M. B. B., Venkateswarlu, B., and Anil Kumar, Singh. 2014. Soil carbon sequestration in rainfed production systems in the semiarid tropics of India. Sci. Total Environ. 487: 587-603. Lal, R., Smith, P., Jungkunst, H. F., Mitsch, W. J., Lehmann, J., Ramachandran Nair, P. K., Alex, B., Mc Bratney, Moraes Sa, J. C. D., Schneider, J., Zinn, Y. L., Skorupa, A. L. A., Zhang, H. L. Minasny, B., Srinivasrao, Ch., and Ravindranath, N. H. 2018. The carbon sequestration potential of terrestrial ecosystems. J Soil Water Conserv. 73(6): 145A-152A. Feng, W. Y., Yang, F., Cen, R., Liu, J., Qu, Z. Y., and Miao, Q. F. 2021. Effects of straw biochar application on soil temperature, available nitrogen and growth of corn. J. Environ. Manage. 277. Accessed at https://doi.org/10.1016/j.jenvman.2020.111331. T4a-11aR-1175 Tillage, residue and nutrient management practices influence soil biology and organic carbon pools of sugarcane cropping system in semi-arid tropics Aliza Pradhan, G C Wakchaure, Dhanashri Shid, and Jagadish Rane ICAR-National Institute of Abiotic Stress Management, Baramati, 413115 MH Intensive tillage coupled with crop residue burning and conventional agronomic practices in sugarcane (Saccharum officinarum L.) cropping system is a serious issue causing soil degradation and environmental pollution. Globally the principles of minimum soil disturbance, crop residue management and suitable nutrient management practices have emerged as alternative strategies for enriching the soil resource base (Jat et al., 2019). For a sustainable agricultural production system, soil organic carbon and soil biology is vital as they regulate all the other chemical, physical and biological properties (Parihar et al., 2018). A number of research studies have reported the potential of these strategies to serve many ecosystem functions such as enhanced soil enzymatic activity, microbial count, carbon sequestration, increased resource use efficiency, making the system resilient towards extreme climate events and climate change mitigation (Choudhary et al., 2018; Datta et al., 2019; Jat et al., 2019). However, benefits of these strategies are needed to be effectively reaped in sugarcane production system that occupies 5 million ha acreage and utilizes more than 5% of country’s irrigation resources on merely 2.6% of the net cultivated area and produces 108 million tonnes of crop residues, annually. In sugarcane-based cropping system, trash burning 591 | Page Resource conservation and rainfed agriculture
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Extended Summaries 22-24 December,
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Resilience through land and water m
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Theme- 2 Ecosystem based approaches
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