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    The effect of repeated prescribed burning on long term growth of Pinus ponderosa in northern Arizona was examined. Fire treatments for hazard reduction were initiated in 1976,and growthwas evaluated in 1988 for fire rotations of 1, 2, 4, 6, 8, and 10 years. Dendroecological analysis shows that there were only small changes in treegrowth (compared tocontrols) in the first few years after the initial fire treatment despite large fuel reductions and thinning, and that annual precipitation was positively correlated with growth. Moderate changes in growth relative to that of control trees were apparent after 1984.The 1-,2-,8-,and 10-year treatments had lower growth than controls after this date, while 4- and 6-year treatments had slightly higher growth. Although additionaldataare needed todetermine long term growth effectsin the longer firerotations,a fire treament interval of 4 to 6 years appears to provide adequate fuel reduction without reducing long term growth in Southwestern P. ponderosa forests.

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    Peterson, David L.; Sackett, Stephen S.; Robinson, Lindsay J.; Haase, Sally M. 1994. The effects of repeated prescribed burning on Pinus ponderosa growth. Int. J. Wildland Fire 4(4): 239-247


    Dendroecology, Pinus ponderosa, Prescribed fire, Tree growth.

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