02903cas a2200385 a 4500 20260818114720.0 110910s1985 th uu|m rtt 0| a1eng d .b10300053 AIT Thesis no.AE-85-12 Borah, Apurba Kumar Further development of a manual rice seedling transplanter Bangkok : Asian Institute of Technology, 1985 83 p. Thesis ; no. AE-85-12 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development Thesis (M.Eng.) - Asian Institute of Technology, 1985 Field 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. Transplanting machines Gee-Clough, D., Chairperson Gupta, Chandra P., Examination Committee Cochran, Billy J., Examination Committee Government of Australia, Scholarship Donor Asian Institute of Technology. Thesis ; no. AE-85-12 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B19928 .b10300053 mnait s 240402 2 951012 m a s 0 mnait mnarc 22 40 Barcode : 30050120582431 CREATED : 2014-10-02 RECORD # : i12760092 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120303432 CREATED : 2016-05-25 RECORD # : i12992690 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 48264 48264 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.AE-85-12 30050120582431 2026-08-18 11:47:20 3 2026-08-18 22 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no.AE-85-12 30050120303432 2026-08-18 11:47:20 2026-08-18 40