Boosting Rice Yields in Cambodia: The Role of Biochar, Basalt, and Compost
Rice is not just a staple food in Cambodia—it is central to the nation’s culture, economy, and food security. Yet, rice yields across much of the country remain constrained by poor soil fertility, nutrient leaching, and unsustainable farming practices. New research suggests that innovative soil amendments—particularly biochar, basalt rock dust, and compost from biogas digestate—could help close this productivity gap while also enhancing environmental sustainability (Lai et al., 2023; Hassan et al., 2024). Biochar: A Proven Yield Booster Biochar, a stable carbon-rich material produced from biomass, has received considerable attention for its role in improving soil health. Studies in Cambodia demonstrate that applying biochar at rates of 2–4 tonnes per hectare can increase rice yields by 10–32% compared to conventional practices (Lai et al., 2022; Liu et al., 2022). The key benefits include reduced nitrogen leaching, enhanced soil nutrient retention, and improved water-use efficie...