Four decades after being type converted to a non native grassland, the soil and hydrology of the USFS San Dimas Experimental Forest in southern California was compared to the adjacent, natural chaparral.
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Williamson, T. N., R.C. Graham and P.J. Shouse. 2004. Effects of a chaparral-to-grass conversion on soil physical and hydrologic properties after four decades. Geoderma 123:99-114.