Abstract
About 7,000 acres of sandy soil derived from Miocene marine sand deposits occur in central Santa Cruz County, California. Within the Santa Cruz Mountains, Pinus ponderosa is restricted to open forests on these sandy soil. The pine communities, apparent edaphic climaxes, are surrounded by redwood and mixed evergreen forests on soils of finer texture. Regional vegetation patterns may be governed by soil moisture—holding capacity, low fertility of the sands, and the degree of flammability of the vegetation. See full-text article at JSTOR
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