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2009 - 200912010 - 20202
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Author: Arvind Kumar × Start date: 2003 × Thesis Type: Ph.D ×
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    ThesisItemOpen Access
    Response of rhizospheric management on soil health and nutrient use efficiency in wheat (Triticum aestivum L.)
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2020-02) Arvind Kumar; Singh, Vijay Pal
    A field experiment entitled "Response of rhizospheric management on soil health and nutrient use efficiency in wheat (Triticum aestivum L.)" was conducted during rabi seasons of 2017-2018 and 2018-19 in the D-3 block of Norman E. Borlaug, Crop Research Centre (CRC) of Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, District, Udham Singh Nagar (Uttarakhand). The experiment was conducted with 19 treatment combinations and 3 replications in a factorial randomized block design. The treatments were consisted of 3 different placement methods viz: Deep placement, surface application and Band placement, Six nutrient management options viz: 100% RDF (150:60:40 kg/ha NPK), 75% RDF (112.5:45:30 kg/ha NPK), 75% RDF +Vermicompost (2 q/ha), 75% RDF +Vermicompost (2 q/ha) +PSB (10 kg/ha), 75% RDF + Poultry manure (2 q/ha), 75% RDF + Poultry manure (2 q/ha) +PSB (10 kg/ha) with one absolute control. Results suggested that among the different placement methods; Deep placement performed significantly better over rest of the treatments in all the growth, yield attributing characters, yield parameters and soil health parameters. However, it was at par with Band placement. Among the nutrient management treatment, 75% RDF + Vermicompost+ PSB found to be significantly superior to the rest of the nutrient management options. It was also found at par with 100% RDF and 75 % RDF+ Poultry manure+ PSB. Absolute control plot recorded the lowest improvement in growth, yield attributes, yield and soil health. Combined application of Deep placement and 75% RDF+ Vermicompost +PSB or 75% RDF + poultry manure + PSB was found to be the best treatment as they resulted in yield enhancement and improvement in soil health. It also showed economical effectiveness compared to other treatments. Considering widespread low nutrient use efficiency of fertilizers, rhizospheric manipulation with fertilizer placement and nutrient management approach can help in improving both productivity and soil health along with a reduction in the rate of fertilizers. The addition of organic matter into the soil maximized the rhizospheric efficiency and nutrient use efficiency of wheat.
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    ThesisItemOpen Access
    Design and performance investigation of line start permanent magnet synchronous motor
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2019-08) Arvind Kumar; Srivastava, Ajay
    Electric motors are the workhorse of the modern industries and consume about 70 % of the industrial electrical demand. Constructing motors with better efficiency can result in a reduction in energy consumption and cost savings to the consumer. The solution of increasing a motor’s efficiency is to use permanent magnets motors which eliminate the excitation losses experienced by induction machines, thereby increasing the motor’s efficiency. The past 25 years have been a significant period with advances in the development of line start permanent magnet motors. Over this period, these motors have expanded their presence in the industrial and domestic marketplace. LSPMSMs can offer higher efficiency than standard induction motors used in the industry. Due to nonlinear characteristics of magnetic materials, finite element method is considered to be a better approach for design and analysis of line start permanent magnet motors. In order to find the optimized structure, different rotor structures of line start permanent magnet motors are comparatively studied in terms of dynamics and steady state performance. The placement and volume of magnet plays a critical role in motor performance. Three types of rotors with different layers of permanent magnets are proposed and analyzed using finite element method. The performances of three motors are compared to get the best configuration of line start permanent magnet motor.
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    ThesisItemOpen Access
    Studies on genetic components of variance under low nitrogen and drought conditions in maize (Zea mays L.)
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2009-09) Arvind Kumar; Warsi, M.Z.K.