Challenge Cost Share Agreement No. CCS-11020399-23 betweenChallenge Cost Share Agreement • July 16th, 2025
In ponderosa pine (Pinus ponderosa Laws.) forests of the western US, multiple historical, observational, and experimental studies have documented an overall ecological paradigm in which episodic, frequent, low-severity surface fires maintained patchy but generally low tree densities in multisized, multiaged forest stands (e.g., Woolsey 1911, Leopold 1924, Weaver 1943, 1951, Cooper 1960, White 1985, Arno 1988, Savage 1991, Mutch et al. 1993, Covington and Moore 1994, Hardy and Arno 1996, Covington et al. 1997, Fenney et al. 1998, Mast et al.