03820nas a2200421 a 4500 20260818090111.0 190628s2015 th m rtt 0| eng d .b12316933 AIT Thesis no.AE-15-01 Jatupan Promiem Design and development of a tractor front-mounted, single-row cassava stem chopper Pathum Thani, Thailand : Asian Institute of Technology, 2015 104 p. : ill. Thesis ; no. AE-15-01 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Agricultural Systems and Engineering, School of Environment, Resources and Development Thesis (M. Eng.) - Asian Institute of Technology, 2015 Currently, Thailand is the third largest cassava producer of the world and highest in South- East Asia . The annual cassava export value of Thailand has a growth trend of about 100% between 2009 and 2013. There are many processes of cassava production such as land preparation, planting, weed control, fertilization, irrigation and harvesting . However, share of labor and cost in the harvesting process is highest compared to other process. The labor share of cassava harvesting is 61.7% of total cassava pr oduction. Cassava harvesting has been always time and manpower consuming operation. At the moment, the tractor -mounted cassava digger and conveyer is developing in which the famers are involved in cutting, collecting, and stor ing before it is used in the field . During these processes , it requires 50.33 hours (0.02 ha/hr ) per person to finish the land area of one hectare . Therefore, this research highlights the importance of new machine and develops the prototype model called Cassava Stem Chopper that works automatically which do not require any labor meaning reducing the harvesting cost and solve labour shortage problem. This prototype single row cassava stem chopper consists of main frame, a transmission gear unit, a cutting unit, a feeding unit, and a chopping unit. The result found that the average chop ping capacity of this machine was in the range of 171- 819 kg/hr with the traveling speed of 1.44 - 2.42 km/hr. T he re -germination of chopper was 7.5% . In addition to these, it was found that this cassava stem chopper can work 7.5 times faster than traditional method. The break- even point area of the chopper with the capacity of 0.15 ha/hr was equal to 46.2 ha/year at 1.45 km/hr. Cassava Tractors Design and construction Tractors in agriculture Soni, Peeyush, Chairperson Loc Thai Nguyen, Examination committee Anuchit Chamsing, Examination committee Chaiyaphol Kaewprakaisaengkul, Examination committee RTG Fellowship, Scholarship donor AIT Fellowship, Scholarship donor Asian Institute of Technology. Thesis ; no. AE-15-01 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B01755 .b12316933 mnait m 240422 0 190627 m a m 0 mnait mnait 20 Barcode : 30050120959068 CREATED : 2019-06-28 RECORD # : i13199626 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120959076 CREATED : 2019-06-28 RECORD # : i13199638 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 26886 26886 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.AE-15-01 30050120959068 2026-08-18 09:01:11 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 50.00 0 AIT Thesis no.AE-15-01 30050120959076 2026-08-18 09:01:11 2 2026-08-18 20