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Subject: Agronomy ×

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Now showing 1 - 9 of 290
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    ThesisItemOpen Access
    Effect of Hydrogel and Foliar Spray of Agro-chemicals on Productivity of Indian Mustard [Brassica juncea (L.) Czern & Coss]
    (2022) Choudhary,Jitendra; Priyanka Kumawat
    A field experiment was conducted during rabi season, 2021-22 at the Agronomy farm, S.K.N. College of Agriculture, Jobner, to study the “Effect of Hydrogel and Foliar Spray of Agro-chemicals on Productivity of Indian Mustard [Brassica juncea (L.) Czern & Coss]”. The experiment was laid out in factorial randomized block design with three replications, assigning sixteen treatment combinations consisting of four hydrogel levels (control, 2.5, 5.0 and 7.5 kg/ha) and four treatments of foliar spray of agro-chemicals (water spray, thiourea 500 ppm, salicylic acid 100 ppm and NPK (19:19:19) 0.5 %) were applied to the Indian mustard var. Giriraj (DRMRIJ-31). The experimental results showed that application of hydrogel at 5.0 kg/ha, being at par with application of hydrogel at 7.5 kg/ha, recorded significantly higher plant height, dry matter accumulation, chlorophyll content, number of primary and secondary branches, CGR, number of siliqua/plant, number of seeds/siliqua, seed yield (1797 kg/ha), stover yield (3863 kg/ha), biological yield (5660 kg/ha), net returns ( 93379/ha) and B:C ratio (3.82) of Indian mustard as compared to hydrogel at 2.5 kg/ha and control. Further, the same trend was also observed for nitrogen, phosphorus and potassium content in seed and stover and their uptake by seed, stover and total uptake, protein content in seed, oil yield, water use efficiency and soil moisture content in soil. While, the plant stand, RGR, number of primary and secondary branches at 40 DAS, test weight and harvest index of Indian mustard was not improved significantly due to different levels of hydrogel. Results further showed that foliar spray of thiourea (500 ppm) being at par with salicylic acid (100 ppm) recorded significantly higher dry matter accumulation, number of primary and secondary branches, CGR, number of siliqua/plant, number of seeds/siliqua, seed yield (1820 kg/ha), stover yield (3897 kg/ha), biological yield (5717 kg/ha), nitrogen, phosphorus and potassium uptake by seed, stover, oil content, oil yield, along with higher water use efficiency, net returns ( 95733/ha) and B:C ratio (3.95) of Indian mustard. However, maximum plant height chlorophyll content, nitrogen, phosphorus and potassium content in seeds were recorded under foliar spray of NPK (19:19:19) 0.5% which was statistically at par with thiourea (500 ppm).
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    ThesisItemOpen Access
    Effect of fertility levels and weed management practices on weed dynamics, growth, yield and quality of linseed (Linum usitatissimum L.) and their residual effect on fodder pearl millet (Pennisetum glaucum L.)
    (2022) Singh, Deshraj; Gupta, K. C.
    Present field experiment was conducted at experimental farm, Rajasthan Agricultural Research Institute, Durgapura – Jaipur for two consecutive years during Rabi season of 2016-17 and 2017-18 to evaluate the effect of treatments on weed dynamics, growth, yield, quality and economics of the crop followed with Summer 2017 and 2018 for assessing residual effect of fertility levels and weed management practices on succeeding fodder pearl millet on loamy sand soil. There were 28 treatment combinations consisting of 04 fertility levels (75 % RDF, 100 % RDF, 125 % RDF and 150 % RDF) and 07 weed management practices (Weedy check, hand weeding, Pendimethalin 30 EC, Pendimethalin 38.7 CS, Clodinafop propargyl 15 WP and Imazethapyr 10 % SL and Weed free) were tested in factorial randomized block design with three replications. Results indicated that 150 % RDF dose proved significantly superior to other fertility levels with respect to plant height, number of branches per plant, per plant dry matter accumulation (g) and leaf area (cm2 ). The yield attributes viz. number of capsules plant-1 and weight of capsules plant-1 (g) and seed, stover and biological yields were significantly higher in 150 % fertility level. The uptake of NPK was also significantly higher with the application of 150 % RDF dose. Oil and protein yield were also recorded significantly higher under 150 % RDF. Results showed that weed density of most of broad leaved weeds were most effectively controlled by pre-emergence application of Pendimethalin 38.7 CS followed by Pendimethalin 30 EC, Imazethapyr 10 % SL and Clodinafop propargyl 15 WP. Similarly grassy weeds were most effectively controlled by Pendimethalin 38.7 CS followed by Pendimethalin 30 EC, Clodinafop propargyl 15 WP and Imazethapyr 10 % SL. Maximum seed and stover yields were obtained under weed free and hand weeding at 20-25 DAS followed with Pendimethalin 38.7 CS. However, maximum net returns and B:C ratio (Rs. 43153 ha-1 and 2.31) were obtained under application of Pendimethalin 38.7 CS. Amongst the combined use of studied production factors, application of 150 % RDF along with weed free proved optimum for realizing higher productivity (1509 kg ha-1 ). Further, the application of 150 % RDF along with Pendimethalin 38.7 CS proved optimum for realizing higher net returns (Rs. 50023 ha-1 with B:C ratio of 2.50). The result of present investigation suggested that the application of 150 % RDF and Pendimethalin 38.7 CS or hand weeding proved as sustainable approach to augment the productivity and profitability of crop. There was no significant residual effect of fertility levels and weed management practices on succeeding summer fodder pearl millet
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    ThesisItemOpen Access
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    ThesisItemOpen Access
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    ThesisItemOpen Access