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International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad acetic acid (MAA). It contains both thio and carboxylic acid functional groups. It is used in salt forms including calcium thioglycolate and sodium thioglycolate. Farming situation is irrigated and soil is sandy loam in Jhunjhunu district. The sowing of wheat crop was done from second week to last week of November under irrigated condition. Two foliar spray of TGA agrochemical (100 ppm) on 15 days interval for two times at first and second fortnight in February month was done by knapsack /power sprayer. Crop was harvested during first/ second week of April. The data analyzed revealed that the average gross return and net return was `107636 and `96495; `59111 and `49043 of foliar spray demonstration and local check, respectively. It could be concluded that average production (12.11 %) and net profit of wheat crop (20.52%) were increased by foliar spray of TGA under field conditions. The total cost of TGA agro-chemical material along with two foliar spray cost was about `500/ha. Hence, two foliar spray of TGA agro-chemical at tillering and milking stage in wheat crop could be added in package of practices and motivate the farmers for adoption of new techniques for stress management in wheat crop and getting economic returns. T5-11P-1024 Effect of Foliar Application of Different Nanofertilizers on Performance of Rainfed Maize in Southern Telangana K. A. Gopinath 1 , V. Visha Kumari 1 , K. Sammi Reddy 1 , V. K. Singh 1 , G. Ravindra Chary 1 , A. K. Shanker 1 , S. Kundu 1 , M.R. Krupashankar 2 , Tarunendu Singh 2 and B. Rajkumar 1 1 ICAR-Central Research Institute for Dryland Agriculture, Hyderabad, Telangana 500 059, India; 2 Indian Farmers Fertilizer Cooperative Limited, IFFCO Sadan, New Delhi 110 017, India Limited nutrient use efficiency and environmental constraints associated with the use of chemical fertilizers remain a hindrance for achieving reasonable sustainability in agriculture. Additionally, cost increases resulting from over-application of chemical fertilizers reduce profit margins for growers. Several strategies have been proposed to increase fertilizer use efficiency, such as the use of precision fertilization, split or localized application, fertigation, and the use of nanofertilizers. Studies have revealed that some nanofertilizers have the potential to increase crop productivity by enhancing seed germination, seedling growth, photosynthesis, nitrogen metabolism, and protein and carbohydrate synthesis, aside from improving stress tolerance. However, there is scarcity of information especially on effect of nanofertilizers on growth and yield of rainfed crops, nutrient use efficiency and on soil properties. Methodology A field experiment was conducted during kharif, 2021 at Gunegal Research Farm (GRF) of ICAR-CRIDA, Hyderabad to study the effect of nano-N, nano-Zn and Nano-Cu alone and in combinations with different doses of recommended NPK on rainfed maize (cv. DHM 111). Soil of the experimental site was sandy loam; slightly acidic in reaction (pH 6.51), EC was in Emerging approaches (RS, AI, ML, Drones etc) for crop management &assessment 724 | Page
International Conference on Reimagining Rainfed Agro-ecosystems: Challenges & Opportunities during 22-24, December 2022 at ICAR-CRIDA, Hyderabad normal range (0.05-0.07 dS/m), low in organic carbon (0.43%), available N (229.1 kg/ha), high in available P (24.7 kg/ha) and medium in available K (218.1 kg/ha). The experiment was arranged in a randomized block design with three replications. The experimental plots were tilled to a depth of 15-20cm using tractor-drawn cultivator twice before sowing of the crop. Sowing was done with tractor-drawn seed drill at a spacing of 90 cm × 20 cm. Thinning and gap filling was done 10-15 days after sowing, as required. The recommended dose of NPKZn was 90:45:45:25 kg N, P2O5, K2O and ZnSO4/ha. Nanofertilizers were sprayed @ 2ml/liter water at 25 and 45 days after sowing as per the treatment, using a battery-operated power sprayer. Results Application of recommended dose of fertilizers (NPKZn) with foliar spray of nano-N + nano- Zn twice at 25 and 45 days after sowing being on par with N100PK + nano-N + nano-Zn + nano- Cu, recommended NPK, N 100PKZn + nano-N, N 75PKZn + nano-N, N 100PK + nano-Zn, N 75PK + nano-N + nano-Zn and N 100PK + nano-Cu recorded significantly higher SPAD value (42.7) compared to other treatments. Foliar application of nano-N, nano-Zn and nano-Cu with application of either 75% or 100% recommended N recorded similar but significantly higher leaf area index (LAI) compared to foliar spray of nanofertilizers with control (no N) and 50% recommended N. Application of recommended NPK with foliar spray of nano-N + nano-Zn + nano-Cu or nano-N + nano-Zn recorded significantly higher 100-grain weight (28.4-28.6 g) compared to other treatments. Similarly, application of recommended NPK + foliar spray of nano-urea + nano-Zn + nano-Cu being on par with recommended NPK + foliar spray of nanourea + nano-Zn recorded significantly higher grain yield (3308 kg/ha) compared to other treatments. Kumar et al. (2022) also reported increase yield of wheat, sesame, pearl millet and mustard with application of nano-N and nano-Zn. Application of recommended NPK + foliar spray of nano-N + nano-Zn also recorded significantly higher stalk yield (6179 kg/ha) compared to other treatments except recommended dose of fertilizers alone, recommended NPK + nano-Zn, foliar spray of nano-N + nano-Zn with application of either 50% or 75% recommended N, recommended NPK + nano-Cu, and N100PK + nano-N + nano-Zn + nano-Cu treatments. Application of recommended NPK + foliar spray of nano-N, nano-Zn and nano-Cu twice at 25 and 45 days after sowing recorded significantly higher harvest index (0.36) compared to other treatments except N75PKZn + nano-N, N100PKZn + nano-N, N100PK + nano- Zn, N 75PK + nano-N + nano-Zn, and N 100PK + nano-N + nano-Zn + nano-Cu. 725 | Page Emerging approaches (RS, AI, ML, Drones etc) for crop management &assessment
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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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Resource conservation and rainfed a
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Theme- 6 Institutional and policy i
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