| Author | Celocia, Caesar Argabio |
| Call Number | AIT Thesis no. AE-83-09 |
| Subject(s) | Farm mechanization
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | The CAAMS-IRRI developed rice reapers (1.0 m and 1.6 m) and IRRI developed axial flow threshers (TH-6 and TH-8) were tested to evaluate their field
performance and the economics of operation.
The 1.0 m and 1.6 m reapers had field capacity of 0.21 ha/hr (63.7% efficiency) and 0.35 ha/hr (57.6% efficiency) respectively, at 3/4 throttle setting.
Losses increased with the delay in harvesting operation and increasing cropping density. Compared to manual harvesting, the labor requirement was reduced by
79% and 84% for the 1.0 m and 1.6 m reapers respectively, and had break-even point at 25 ha/yr for 1.0 m reaper and 30 ha/yr for 1.6 m reaper for single
cropping per year.
At 720 cylinder rpm, the TH-6 thresher had capacity of 0.35 tons/hr (92.2%
efficiency) for reaper cut with average straw length of 78 cm and 0.49 tons/hr
(94.2% efficiency) for sickle cut paddy with average straw length of 41 cm.
For the TH-8 thresher at the same cylinder speed, the capacity was 0.49 tons/hr
(89.7% efficiency) for reaper cut and 0.70 tons/hr (92.7% efficiency) for sickle
cut paddy. Losses were found to increase with the delay in threshing operation.
Compared to manual threshing, the labor requirement was reduced by 67% for reaper
cut and 77% for sickle cut using the TH-6 thresher, and by 77% for reaper cut and 84% for sickle cut using the TH-8 thresher. The TH-6 thresher had a breakeven points at 95 tons/yr for sickle cut and 130 tons/yr for reaper cut, while the TH-8 thresher had break-even points at 168 tons/yr for sickle cut and 223 tons/yr for reaper cut.
Based on their capacities and the time the machines .are used, a 1.0 m reaper requires one TH-6 thresher and a 1.6 m reaper requires one TH-8 thresher
to accomplished threshing of the harvested crop on seasonal basis. |
| Year | 1983 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Singh, Gajendra
|
| Examination Committee(s) | Gee-Clough, D. ; Koike, Masayuki
|
| Scholarship Donor(s) | US-ASEAN |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1983 |