Figure 2
From: Historic Fire Regime of an Upland Oak Forest in South-Central North America
Prescribed burn on 4 March 2010 at Okmulgee Game Management Area, Oklahoma, USA. Air temperatures ranged from 7°C to 13°C, relative humidity 30% to 40%, and wind speeds ranged from 3 km h− 1 to 16 km h− 1. Fire observations indicated slow rates of spread and flame lengths <0.3 m in forested areas and 0.9 m to 1.8 m in areas dominated by herbaceous plants. Photo courtesy of John Polo, Oklahoma State University.