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International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad available nitrogen (178 kg/ha), and medium available phosphorus (18 kg/ha) and potassium (108 kg/ha). The experiment consisted of ten treatments of inorganic and organic combinations of nutrient sources, viz T 1: Control; T 2: 100 % recommended fertilizer dose- RFD (60:40:20 NPK kg/ha); T3: 50 % RFD NPK; T4: 50 % N (crop residue); T5: 50 % N (FYM); T 6: 50 % RFD + 50 % N (crop residues); T 7: 50 % RFD + 50 % N (FYM); T 8: FYM 10 t/ha; T9: 100 % RFD + ZnSO4 20 kg/ha and T10: Farmers practice (FYM 4 t/ha + urea 40 kg/ha). Maize (var Mansar) was shown in the month of June- July and harvested in September-October during kharif seasons of 2019 to 2020, respectively. The crops were sown in lines with a spacing of 60 cm x 20 cm, respectively. Results Among the different organic and inorganic treatments, the maximum plant height (215 cm) was recorded with application of 50 % recommended NPK + 50% N (FYM) which was found to be statistically at par with the treatment where application of 50 % recommended NPK + 50% N (Crop residues) was applied during the experimentation. The improved growth in plant might be due to increased cell division and photosynthetc efficency because of enhanced availabilty of nutrients. (Tomar et al., 2017). With regard to yield and yield attributes, the treatment where application of 50 % recommended NPK + 50% N (FYM) was applied recorded significantly highest grain (22.33 q ha -1 ) and stover (46.26 q ha -1 ) yield of maize which was statistically at par with the treatment 50 % recommended NPK + 50% N (Crop residue) while the lowest yield was recorded in control plots. Likewise, the highest net returns to the tune of ₹ 24716 ha -1 was realized with the application of application of 50 % recommended NPK + 50% N (FYM) with B:C ratio of 2.01. Similar results were observed by Gupta,et.al( 2014). The increase in yield with addition of FYM alone or in combination of inorganic fertilizers may be attributed to the fact that FYM being the store house of nutrients also made release of applied nutrients at its optimum at the same time improved the soil physical conditions (Kumar et al. 2002). Treatment Effect of organic and inorganic nutrients on growth yield and economics of maize under rainfed conditions (pooled data of two years) Plant height (cm) Grain yield (q ha -1 ) Straw yield (q ha -1 ) Net returns (₹ ha -1 ) Control 171 7.55 18.00 853 0.95 100 % recommended NPK 195 17.29 36.68 16881 1.79 50 % recommended NPK 184 12.09 26.56 7138 1.36 50 % recommended N (Crop residue) 187 13.25 28.62 7859 1.37 50 % recommended N (FYM) 187 14.04 29.97 8658 1.39 50 % recommended NPK + 50% N (Crop 205 20.63 42.51 21496 1.90 B.C Resource conservation and rainfed agriculture 608 | Page
International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad residue) 50 % recommended NPK + 50% N (FYM) 215 22.33 46.26 24716 2.01 FYM @ 10 t/ha 189 18.98 39.67 15986 1.62 100 % recommended NPK + ZnSO 4 @ 20 kg/ha 200 19.53 40.47 21367 1.99 Farmer’s method (FYM @ 4 t/ha + 40 kg Urea/ha) 194 15.39 33.23 12193 1.56 Mean 193 16.11 34.19 8090 0.85 CD=(P=0.05) 11.81 3.12 5.69 Conclusion It can be safely concluded from the above observations that application of 50 % recommended NPK through chemical fertilizer in combination with application of 50% N through FYM resulted in higher plant height, yield and yield attributes of maize under subtropical conditions of Jammu. References Gupta V, Sharma A, Kumar J, Abrol V, Singh B and Singh M. 2014. Integrated nutrient management in maize-gobhi sarson cropping system in low altitude sub-tropical region in foothills. Bangladesh Journal of Botany. 43(2): 147-155. Kumar A, Thakur KS and Manuja S. 2002. Effect of fertilizer levels on promising hybrid maize (Zea mays) under rainfed conditions of HP. Indian Journal of Agronomy. 47: 526-528. Tomar S. S, Singh A, Dwivedi A, Sharma R, Naresh R. K, Kumar, Tyagi, S, Singh A, Yadav S, Rahul N, and Singh, B. P. 2017. Effect of integrated nutrient management for sustainable production system of maize (Zea Maya L.) in Indo-Gangetic plain zone of India. International Journal of Chemical studies. 5(2): 310-316. Singh, R.B. 2000. Environmental consequences of agricultural development: a case study from the green revolution state of Haryana, India, Agric., Ecosystem and Envir. 82, 1-3, pp. 97-103. Acharya N. G. Ranga. 2021 Agricultural University is a public agricultural university with its headquarters at the village Lam, Guntur district, Andhra Pradesh, India. Wikipediahttps://angrau.ac.in/downloads/AMIC/OutlookReports/2021/7- MAIZE_Jianuary%20to%20December%202021.pdf. 609 | 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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Theme- 6 Institutional and policy i
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