Browsing by Author "Rakhi Mahto"

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EFFECTS OF HYDROGEL AND SALICYLIC ACID ON THE GROWTH AND YIELD OF MUSTARD UNDER RAINFED CONDITION
(Bangladesh Botanical Society, 2023) Rakhi Mahto; Rajesh Kumar Singh; Ankita; Kartikeya Srivastava
A field experiment was conducted during winter (rabi) season of 2017-18 at Varanasi to evaluate the effects of hydrogel as Super Absorbent Polymer (SAP) and salicylic acid (SA) as stress-ameliorating agent, in growth and productivity of Indian mustard (Brassica juncea L.) at rainfed condition. The experiment comprised nine treatments such as Control (T1), Hydrogel (H) @ 2.5 kg/ha (T2), H @ 5 kg/ha (T3), SA 100 ppm (T4), Salicylic acid (SA) 200 ppm (T5), H @ 2.5 kg/ha+ SA 100 ppm (T6), H @ 2.5 kg/ha+ SA 200 ppm (T7), H @ 5 kg/ha+ SA 100 ppm (T8), and H @ 5 kg/ha+ SA 200 ppm (T9). Among the different treatments, soil application of H @ 5 kg/ha and foliar spray of SA@ 200 ppm registered the highest value (mean of two year) of plant height (177.66 cm), primary (7.37) and secondary branches (7.74), siliqua/plant (306.84) as well as maximum seed yield (18.02 q/ha) and straw yield (2344.09 kg/ha). Exogeneous spray of SA alone with higher dose performed better in all parameters than individual application of hydrogel, however, their combination also gave superior result in minimizing moisture stress in plant. © 2023 Bangladesh Botanical Society. All rights reserved.
Evaluation of Brassica species for growth, yield and heat use efficiency under nitrogen nutrition and iron sulphide nanoparticles application
(Elsevier B.V., 2024) Rakhi Mahto; Rajesh Kumar Singh; Ankita; J.P. Singh; Ravindra Kumar Tiwari; Dinesh Kumar Vishwakarma; Ahmad J. Obaidullah; Amel Gacem; Krishna Kumar Yadav; Ashish Krishna Yadav
The persistent and indiscriminate application of low-efficiency fertilizers, coupled with environmental degradation, poses a substantial threat to the sustainability of agricultural fields. To address these limitations, employing nanotechnology in agriculture emerges as a promising strategy that transforms traditional production systems into advanced agricultural practices, ensuring the sustainability of soil health and crop production. Therefore, a field trial was conducted to assess the effect of genotypes, nitrogen management and iron sulphide nanoparticles on oilseed Brassica at Varanasi in India. The experiment comprised 24 treatment combinations, incorporating three distinct oilseed Brassica species (B. carinata, B. napus, B. juncea) in the main plot, two nitrogen management strategies (100 % recommended dose of fertilizer (RDF) and 75 % RDF with 25 % nitrogen through farmyard manure) in subplots, and four levels of nano iron sulphide (0, 4, 8, and 12 ppm) as sub-subplot treatments. This was arranged in a split-split plot design and replicated thrice during the winter seasons (November–April) of 2017–18 and 2018–19. The statistical examination of the experimental data revealed that among the various treatments, the application of 8 ppm iron sulphide nanoparticles through foliar spraying, in combination with 75 % RDF and 25 % nitrogen from farmyard manure (FYM) in B. juncea, demonstrated the highest values for parameters such as plant height (cm), dry matter accumulation (g plant−1), the count of primary and secondary branches, number of seeds siliqua−1, number of siliquae plant−1, siliqua length (cm) and seed yield (kg ha−1). Comparable results were noted at different morphological stages concerning dry matter heat use efficiency (DM-HUE), with B. carinata exhibiting the highest efficiency in utilizing heat. B. juncea and B. napus treated with 8 ppm iron sulphide nanoparticles outperformed other treatment combinations in terms of interaction, recording the highest dry matter and seed yield followed by 12 ppm while B. napus treated with water spray recorded the lowest values for the same during both years of research. Therefore, the current study highlights the significance of foliage application of 8 ppm iron sulphide nanoparticles with 25 % nitrogen substitution through FYM along with 74 % RDF in comparison to other treatments promoting sustainable oilseed Brassica production in Mid Indo-Gangetic Plains. © 2024 Elsevier B.V.
Nanotechnology and its role in agronomic crops
(Springer Singapore, 2019) Rakhi Mahto; Neha Chatterjee; Tannu Priya; R.K. Singh
With the rapid advancement in the field of nanotechnology, the application of nanoparticles, with a particle size less than 100 nm, designed for sustainable crop production, reduces nutrient losses, suppresses disease, and enhances the yields. Nanoparticles influence on the key life events of plants that include seed germination, seedling vigor, growth, and photosynthesis to flowering. Furthermore, suitable strategies adopted by plants in the presence of nanoparticles under stressed environments are also being presented. This review systematically summarizes the role of nanotechnology in agronomy of plants. © Springer Nature Singapore Pte Ltd. 2019.
Nanotechnology: A potential approach for abiotic stress management
(Elsevier, 2020) Rakhi Mahto; Priyanka Rani; Reshu Bhardwaj; Rajesh Kumar Singh; Saroj Kumar Prasad; Amitava Rakshit
Abiotic stress alters the soil-plant-atmosphere continuum which adversely affects the crop productivity and plant growth. Abiotic stress is due to both natural as well as anthropogenic activities the major cause for the reduction in crop yields worldwide. There is urgent need of environmental friendly technology to overcome these stresses and improve the resource use efficiency and agricultural sustainability. Nanomaterials are the magic bullets having capability to mitigate the constraints associated with abiotic and biotic stress. Nanoparticles can penetrate specific cellular locations because of their extreme small size and acquired some peculiar properties play significant role in the protection of plants against various abiotic stresses. NMs protects the plants against oxidative stress as they mimic the role of antioxidative enzymes such as superoxide dismutase (SOD), catalase (CAT) and peroxidase (POX) under adverse environmental conditions such as drought, salinity, water logging, extreme temperature, UV-radiation, etc. © 2021 Elsevier Inc. All rights reserved.
Weed management in maize (Zea mays l.) through 4-hydroxyphenylpyruvate dioxygenase inhibitor herbicide with or without a methylated seed oil adjuvant
(Society of Pesticide Science India, 2020) Rakhi Mahto; Chandan Kumar; Rajesh Kumar Singh
The results of a field experiment conducted during winter (rabi) season of 2017-18 at Varanasi to evaluate the bioefficacy of a post-emergence herbicide against weeds and its impact on the yield of maize (Zea mays L.) are reported. The experiment comprised eight weed control treatments viz. topramezone at 20.16, 25.20 and 50.40 g ha–1, topramezone at 20.16 and 25.20 g ha–1 with methylated seed oil (MSO) adjuvant, 2,4-D at 500 g ha–1, hand weeding at 20 and 40 d after sowing (DAS) and unweeded control. Post-emergence application of topramezone @ 25.20 g ha–1 +MSO registered the lowest accumulation of dry matter for all weeds with the highest weed control efficiency and recorded grain yield of 47.12 q ha–1 which was comparable with the hand weeding at 20 and 40 DAS (49.41 q ha–1). Although the maximum seed yield was found in hand weeding treatment, the net return (Rs. 65,214 ha–1) and benefit: cost ratio (3.14) were the maximum in treatment with post-emergence application of topramezone 25.20 g ha–1 +MSO adjuvant. © 2020, Society of Pesticide Science India. All rights reserved.