From the text...'Fire intensity is assumed to influence vegetative producion. This assumption is reasonable; a hot, intense fire should have a more damaging effect than a cool fire. Therefore, production should decrease as fire intensity increases. However, this assumption has not been accurately tested for grassland communities. Previous conclusions about the effect of fire intensity on herbaceous vegetation have been based on research (Blaisdell 1953; Conrad and Poulton 1966) that artifically rated fire intensity, on post fire observations of remaining woody stems or on the general level of vegetative destruction, but failed to actually measure fire intensity. Alexander (1982) suggested that these subjective, qualitative descriptions of fire will vary among individuals and from year to year, depending on the burning season. Rothermel and Deeming (1980) said that fireline intensity (Byram 1959) is a quanitative measure of fire intensity that could be used to explain fire effects in fine porous fuels, such as grasses, that are distributed uniformly over the burn area. The present research determined fireline intensity values on 41 test fires among three different grass types. Fires were ignited under a variety of weather conditions to obtain a wide range of fireline intensities. The primary objectives of the study were: 1) to investigate the relationship between fireline intensity and grass yield and 2) to evaluate the correlation between post-fire grass response and selected prescribed burning variables.'