OpenAlex · 2026-12-31
Researchers in the Philippines built a low-cost mechanical weeder for upland rice using locally sourced materials and found it outperformed manual weeding on speed, efficiency, and cost — clearing fields at nearly 889 m²/hr with 88% weeding efficiency and saving farmers over ₱4,800 in labor per use.
The weeder achieved 88.42% weeding efficiency, surpassing the Philippine National Standard minimum of 80%, while damaging only 0.46% of plants (well below the 6% maximum allowed).
Operating at 1501–3000 rpm, the machine covered 888.99 m²/hr at 74.53% field efficiency, consuming just 0.75 liters of fuel per hour.
Under a machine-rental business model, the investment returns 169% ROI with a payback period of only 0.59 years, saving farmers ₱4,840 in labor costs compared to manual weeding.
