A tractor operated onion harvester was developed with considering available literature regarding onion cultivation packages of practices, existing design of root crop harvester, agronomical parameters of onion, functional requirement of onion harvester and engineering consideration. Manually harvesting was compared to the developed onion harvester and the performance of developed onion harvester was found satisfactory.

Computer simulation is commonly used to visualize and to investigate a particular system without going through practical measurement. A computer simulation also had the flexibility to choose the design parameters to be incorporated at any time. The developed software for designing the matching mouldboard plough bottom could predict the draft, side draft, vertical component, width of implement, dimensions of share, landside, mouldboard, and beam. Stresses acting on different parts of mouldboard plough bottom have predicted.Technologies and computer capacity currently available allow us to...