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Table 2 Heat delivery during burn treatment application by month, treatment, and longleaf pine seedling size class in South Carolina, USA, in 2013. There were no significant interactions among any of the independent variables in the model; the same superscript letter within a column and effect indicates no significant difference; HB = high-intensity burn; LB = low-intensity burn treatment; Max = peak temperature during burn application; Area60 = area above 60 °C within the time−temperature curve; Dur60 = duration (s) with temperature above 60 °C

From: Fire effects on a fire-adapted species: response of grass stage longleaf pine seedlings to experimental burning

   Max (°C) Area60 Dur60 (s)
Effect Level Mean SE Mean SE Mean SE
Month January 315 11 52 951b 2001 348b 7
May 310 12 60 276a 2428 408a 9
P-value 0.364   < 0.001   < 0.001  
Treatment HB 405a 2 72 183a 1207 423a 7
LB 220b 3 40 378b 897 327b 6
P-value < 0.001   < 0.001   < 0.001  
Size class Large 306 16 58 961a 3069 394a 11
Medium 314 14 55 191ab 2641 369b 12
Small 317 14 54 689b 2475 363b 9
P-value 0.144   0.016   0.002