| Hand sickle | Very small plots; commonly under 1 ha | About 0.01–0.03 ha per worker-hour | Small, irregular, terraced, or access-restricted plots; works on soft or uneven ground | Manual cutting; crop is gathered and threshed separately. Requires a large amount of labor. | Low equipment cost, precise cutting, and no need for machine access or fuel. | Slow and labor-intensive. Harvest timing can be difficult when labor is scarce or rain is approaching. |
| Walk-behind reaper | Small farms; roughly 1–5 ha, depending on plot layout | About 0.1–0.3 ha per hour | Relatively firm, level fields with narrow access; suitable for smaller plots that cannot accommodate larger machines | Cuts and lays crop in rows or swaths; gathering and threshing are separate operations. Usually needs an operator and field helpers. | More efficient than hand cutting and generally easier to transport between small plots than a combine. | Does not usually thresh or clean grain. Deep mud, lodged crop, uneven ground, and narrow bunds can reduce performance. |
| Reaper-binder | Small to medium farms; approximately 2–10 ha where plots are accessible | About 0.2–0.5 ha per hour | Level or gently sloping fields with sufficient traction and room for turning; crop should be reasonably upright | Cuts and ties crop into bundles; bundles must be collected and threshed separately. Needs an operator and additional handling labor. | Produces manageable bundles and can simplify drying, transport, and staged threshing. | Requires more handling than a combine. Wet, soft soil and heavily lodged rice can cause delays or poor binding. |
| Small crawler rice combine | Small to medium farms; roughly 2–20 ha, especially with fragmented plots | About 0.15–0.4 ha per hour | Wet paddy fields where tracks help distribute machine weight; useful for smaller plots and limited access routes | Cuts, threshes, and separates grain in one pass. Typically operated by one driver, with support for grain handling and transport. | Combines several harvesting steps and can work in softer paddy conditions than many wheeled machines. | Capacity is lower than that of larger combines. Check field access, turning space, track width, ground pressure, and local service availability. |
| Medium or large combine harvester | Medium to large farms; generally 10 ha and above, or shared/custom-hire operations | About 0.4–1.0 ha per hour | Broad, accessible fields with adequate turning space and soil firm enough for the machine’s weight | Harvests and threshes in one pass, with grain collected in a tank or discharged to transport. Requires an operator and organized grain handling. | High output in suitable fields; reduces separate cutting, bundling, and threshing operations. | May struggle in very soft soil, narrow terraces, small irregular plots, or fields with restricted entry. Transport and grain logistics must match its output. |
| Tracked combine harvester | Medium to large farms or contractors working across multiple wet-field sites | About 0.3–0.9 ha per hour | Soft or waterlogged paddy where lower ground pressure and flotation are priorities; still requires adequate access and turning room | Harvests and threshes in one pass. Grain unloading and transport need to be coordinated with field capacity. | Tracks can improve flotation and reduce the risk of getting stuck compared with many wheeled machines in soft paddy. | Tracks do not make every field passable. Deep mud, weak bunds, steep slopes, and limited access remain important constraints; track maintenance should be considered. |