In a study of three prescribed fires in a mixed-‐ conifer forest at Sequoia and Kings Canyon National Parks, researchers found that the predicted probability of sugar pine survival was 60% for raked trees compared to 7% for un-‐raked trees when the total fuel depth was greater than 30cm.
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Nesmith, Jonathan C.B., Kevin L. O’Hara, Phillip J. van Mantgem, and Perry de Valpine. 2010. The effects of raking on sugar pine mortality following prescribed fire in Sequoia and Kings Canyon National Parks, California, USA. Fire Ecology 6(3):97-116.