000			03751cas a2200409 a 4500
005			20260818094931.0
008			111005s1991 th uu|m rtt 0| a1eng d
035			_a.b10226989
099		9	_aAIT Thesis no.AE-91-07
100	1		_aShirin, Abul Kashem Md.
245	1	0	_aEffect of enamel coating on the performance of a disc plough
260			_aBangkok : _bAsian Institute of Technology, _c1991
300			_a103 p. + _e1 online resource
490	1		_aThesis ; _vno. AE-91-07
500			_aA thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering
502			_aThesis (M.Eng.) - Asian Institute of Technology, 1991
520			_aThe effect of enamel coating on the specific draft requirements of disc plough was studied. The experiments were conducted in a stubbled paddy field of Bangkok clay soil. A steel-sheet disc-shaped plate was fabricated and coated with enamel. The performance of a disc plough with and without this plate fixed on it was evaluated. Effects of soil-moisture content, disc angle, tilt angle and forward speed on the specific draft requirements of the enamel -coated and uncoated disc ploughs were also studied. Three levels of average soil moisture content studied were 33.4%, 29.4% and 23.3% (d.b.), three disc angles were 40°, 45° and 50°, three tilt angles were 17°, 20° and 23° and three average forward speeds were 3, 4 and 5 km/h. The depth of ploughing was constant throughout the experiments. It was observed that at all soil moisture content, the enamel coating reduced the specific draft requirements of disc plough. The overall reduction in the specific draft was in the range of 3.8% to 21.5% depending on the soil moisture content, disc angle, tilt angle and forward speed. This reduction was found statistically significant. At all soil moisture contents and disc angles, the maximum reduction in the specific draft due to enamel coating was found at 23° tilt angle and 5 km/h forward speed. The reduction in the specific draft was found to increase with an increase in soil moisture content. Also increase in the soil-moisture content showed decrease in the specific draft for both the uncoated and enamel coated discs. However the rate of decrease was more in case of enamel coated disc. An increase in tilt angle showed decrease in specific draft requirements of both the discs but the rate of decrease was more in case of enamel coated disc. Increase in forward speed had a tendency to increase the draft sharply for both disc ploughs. However, rate of increase was less in case of enamel coated disc plough. The disc angle setting of more than 45° showed an increase in the specific draft requirements for both the discs.
650		0	_aPlows
650		0	_aCoatings
700	1		_aSalokhe, Vilas M., _eChairperson
700	1		_aGee-Clough, D., _eExamination Committee
700	1		_aGupta, C.P., _eExamination committee
700	1		_aMaohua, Wang, _eExamination committee
710	2		_aGovernment of United Kingdom, _eScholarship donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. AE-91-07
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B17143
907			_a.b10226989 _bmnait _cs
902			_a240329
998			_b2 _c951012 _dm _ea _fs _g0
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945			_lmnarc
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942			_c40
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