A grass savanna underburn is a carefully planned, low-intensity fire applied to maintain open landscapes dominated by grasses with scattered trees. Historically, these ecosystems experienced frequent fire that limited woody encroachment and promoted diverse native plant communities. By reintroducing good fire under appropriate weather and fuel conditions, land managers reduce accumulated thatch, control invasive species, and recycle nutrients back into the soil. Underburning stimulates fresh grass growth, improves wildlife forage, and maintains the open structure characteristic of healthy savannas. When properly implemented, grass savanna underburns reduce wildfire intensity, support biodiversity, and strengthen long-term ecosystem resilience across fire-adapted landscapes.