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"Probably
no single land use has had greater effect on the vegetation of southeastern
Arizona or has led to more changes in the landscape than livestock grazing
range management programs. Undoubtedly, grazing since the 1870s has
led to soil erosion, destruction of those plants most palatable to livestock,
changes in regional fire ecology, the spread of both native and alien plants,
and changes in the age structure of evergreen woodlands and riparian forests."
C.J. Bahre, A Legacy of Change: Historic Human Impact on Vegetation
of the Arizona Borderlands, 1991. | |
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