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008 110910s1985 th uu|m rtt 0| a1eng d
035 _a.b10300053
099 9 _aAIT Thesis no.AE-85-12
100 1 _aBorah, Apurba Kumar
245 1 0 _aFurther development of a manual rice seedling transplanter
260 _aBangkok :
_bAsian Institute of Technology,
_c1985
300 _a83 p.
490 1 _aThesis ;
_vno. AE-85-12
500 _aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development
502 _aThesis (M.Eng.) - Asian Institute of Technology, 1985
520 _aField tests were performed on the AIT developed manual rice transplanter IA-2 under three seedling ages : 21-24 days, 25-28 days and 29-32 days; three water depths: 0-3cm, 3.1-6cm and 6.1-10cm: 6 variations of sedimentation period: 1,3,5,7,9 and 11 days after final levelling and standard soil condition (1 plowing, 1 puddling and then levelling 7-10 days before transplanting). Machine performance was also compared with traditional hand transplanting method. the machine performed better with 25-28 days old seedlings having non-productive hills ranging from 7.5%-12.5% in all three water depths. The machine can be used after the 5th day after final levelling in Bangkok clay soil. The field capacity was measured to be 0.0203 ha/hr at an efficiency of 56% and field machine index 74.4%. Performance of the transplanter was satisfactory in comparison to traditional hand transplanting method. It saved about 40% labor requirement (excluding) nursery preparation) over hand transplanting. At present wage level(1985) in Thailand, machine planting has a break even level at 6.0 ha for single cropping and 3.0 ha for double cropping per year. Possible modifications were recommended for further development to improve performance.
650 0 _aTransplanting machines
700 1 _aGee-Clough, D.,
_eChairperson
700 1 _aGupta, Chandra P.,
_eExamination Committee
700 1 _aCochran, Billy J.,
_eExamination Committee
710 2 _aGovernment of Australia,
_eScholarship Donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. AE-85-12
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B19928
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