Book of Extended summaries ISDA

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International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad Conclusion The highest and significant increase in passive pools humic and fulvic carbon was observed under combined application of FYM 10 t kg -1 + 100 % recommended NPK. Similarly, there was significant carbon build up and stabilization in this nutrient compared to all other practices. Highest concentration of soil organic carbon was observed in surface soil and exponentially decreased with increase in depth after each crop harvest. Hence application of FYM along with NPK resulted in a significant positive buildup of all pools in the treatment at all four depths. Therefore, balance fertilization is panaceally important for sustaining improved soil health with balanced organic status and production potentiality of soil for finger millet monocropping. References Bhattacharjya, S., Bhaduri, D., Chauhan, S., Chandra, R., Raverkar, K.P. and Pareek, N. 2017. [Comparative evaluation of three contrasting land use systems for soil carbon, microbial and biochemical indicators in North-Western Himalaya], Ecol. Eng., 103:21–30 Majumder, B., Mandal, B., Bandyopadhyay, P.K. and Chaudhury, J. 2007. Soil organic carbon pools and productivity relationships for a 34 year old rice–wheat–jute agro ecosystems under different fertilizer treatments. Plant Soil, 297:53–67. Manjaiah, K. and Singh, D. 2001. Soil organic matter and biological properties after 26 years of maize–wheat–cowpea cropping as affected by manure and fertilization in Cambisol in semiarid region of India. Agri. Ecosyst. Environ., 86:155–62. Ram, S., Singh, V. and Sirari, P. 2016. Effects of 41 years of application of inorganic fertilizers and farm yard manure on crop yields, soil quality, and sustainable yield index under a rice-wheat cropping system on Mollisols of North India. Commun. Soil Sci. Plant Anal., 47 (2):179–93. Zou, X. M., Ruan, H. H., Fu, Y., Yang, X. D. and Sha, L.Q. 2005. Estimating soil labile organic carbon and potential turnover rates using a sequential fumigation-incubation procedure. Soil Biol. Biochem., 37:1923–28. 460 | Page Sustainable soil management for resilient rainfed agro-ecosystem: conservation agriculture, organic farming, INM, soil-microorganisms-plant interactions

International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities during 22-24, December 2022 at ICAR- CRIDA, Hyderabad Effect of FYM and synthesised fertilizer application, on POXC and TOC under fingermilletmonocropping Treatment POXC 0-15 cm 15-30 cm 30-45 cm 45-60 cm 0-15 cm 15-30 cm 30-45 cm 45-60 cm T 1: Control 0.42 0.35 0.35 0.29 4.40 4.19 3.48 2.25 T 2: Only organic manure 0.52 0.42 0.36 0.25 6.85 3.89 4.60 3.58 T 3: Organic manure+ 50% Rec. NPK 0.54 0.50 0.44 0.37 7.06 8.39 3.99 2.15 T 4: Organic manure+ 100% Rec. NPK 0.59 0.54 0.53 0.40 10.84 7.57 4.19 4.50 T 5: Only 100% Rec. NPK 0.45 0.41 0.41 0.35 5.62 3.68 3.99 3.48 S.Em.± 0.00 0.00 0.00 0.00 0.08 0.07 0.01 0.03 CD at 5 % 0.01 0.01 0.01 0.01 0.25 0.23 0.04 0.10 POXC: Permanganaseoxidisable carbon, TOC: Total organic carbon TOC Effect of FYMand synthesised fertilizer application on oxidisable carbon fractions (very liable, liable and less liable carbon fraction) under fingermilletmonocropping Very liable carbon (g kg -1 ) Liable carbon (g kg -1 ) Less liable carbon (g kg -1 ) Treatment 15-30 30-45 15-30 30-45 45-60 0-15 15-30 30-45 45-60 0-15 cm 45-60 cm 0-15 cm cm cm cm cm cm cm cm cm cm T 1: Control 1.30 1.13 1.01 0.89 0.45 0.40 0.38 0.26 1.03 0.77 0.69 0.22 T 2: Only organic manure 1.45 1.16 1.01 0.74 1.14 0.68 0.43 0.04 1.14 0.83 0.61 0.58 T 3: Organic manure+ 50% Rec. NPK 1.54 1.48 1.16 0.62 1.02 0.65 0.59 0.53 1.31 0.77 0.54 0.14 T 4: Organic manure+ 100% Rec. NPK 1.81 1.36 0.95 0.56 1.25 0.32 0.24 0.09 1.45 1.00 0.36 0.31 T 5: Only 100% Rec. NPK 1.45 1.04 0.92 0.53 0.45 0.19 0.16 0.12 0.46 0.31 0.20 0.07 S.Em.± 0.01 0.01 0.00 0.00 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 CD at 5 % 0.02 0.02 0.01 0.01 0.04 0.02 0.02 0.02 0.04 0.03 0.02 0.02 Sustainable soil management for resilient rainfed agro-ecosystem: conservation agriculture, organic farming, INM, soil-microorganisms-plant interactions 461 | Page

Page 1 and 2: Extended Summaries 22-24 December,

Page 3 and 4: Citation Rama Rao, C.A., Srinivasa

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