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Theses

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1991 - 19962
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Subject: Farm, Machinery and Power × Author: KAU × End date: 1999 × Start date: 1991 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Design, development and evaluation of a power tiller operated bed former
    (Department of Farm Power Machinery and Energy, Kelappaji College of Agricultural Engineering and Technology, Tavanur, 1991) Shaji James, p; KAU; Sankaranarayanan, M R
    A power tiller operated Bed Former was developed and evaluated. The main components of the prototype unit of the power tiller operated Bed Former are, a main frame, two pairs of forming boards, a leveling board, a hitching unit and a depth control cum transport wheel. The equipment was found capable of forming seed beds of heights 22 cm, 18 cm and 15 cm at a width range of 60-64 cm. Heights of 18 cm and 15 cm were possible at width ranges of 73-75 cm and 80 – 81 cm. The draft of the implement ranges from 115.59 kgf to 169.69 kgf. The power utilization of the implement varies from 0.586 hp to 0.771 hp and the wheel slip between 46.76 per cent and 77.1 per cent. The mean effective field capacity of the implement is 0.0996 ha/hr and the mean field efficiency is 46.3 per cent. The total cost of production of the unit is Rs. 2000/- and the cost of operation per hectare is Rs. 777/-. The amount that can be saved by using the implement is Rs. 1473/- per hectare.
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    ThesisItemOpen Access
    Development and testing of a large diameter pit digger for laterite terrain
    (Department of Farm Power Machinery and Energy, Kelappaji College of Agricultural Engineering and Technology, Tavanur, 1996) Preman, P S; KAU; Jippu, Jacob
    A large diameter pit digger was developed as an attachment to tractor for making large size pits in laterite suitable for planting saplings of trees especially for coconut palms. It was tested and evaluated at the Kelappaji College of Agricultural Engg. & Tech., Tavanur. The pit digger mainly consisted of a tractor rear-mounted twin-blade laterite cutter. The twin-blade laterite cutter essentially consisted of two circular blades, a main shaft, two cast iron hubs, two bearings and bearing blocks, power transmission elements, a main frame, two protective shields and one stopper. A 3 phase, 3-hp electric motor of 1440 rpm at a speed at a speed ratio of 2.1:1 was used for rotating the blades. By using a jib crane twin-blade laterite cutter was hitched to the three point hitch system of a tractor. Pit having approximately a square-horizontal cross-section and stepped or rebated downwards in four steps was made in laterite. Size of pit obtained was 1290 x 1190 mm at the top and 830 x 623 mm at the bottom with a total depth of 900 mm. The volume of pit was 0.914 m3. The capacity of machine was 2.24 pits of 0.914 m3 in a day of 8 h. For making a pit of 0.914 m3, the total electrical energy consumption was 4.111 kWh and the diesel fuel consumed by tractor was 18.5 L. The cost of digger excluding cost of motor, jib crane and tractor was Rs. 3800. The operating cost of the digger was Rs. 140.61 per hour and the cost of making one pit was Rs. 453.23. After taking in to account of the cost recovered due to the 41 laterite blocks obtained while making the pit, the net cost of making a pit was Rs. 207.12.