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The study analyzes the expansion of timber plantations, primarily Pinus radiata, in south-central Chile from 1975 to 2007. Using satellite imagery and autologistic regressions, the research finds that plantations grew from 5.5% to 42.4% of the landscape. Early expansion (1975–1990) was strongly linked to forest-suitable soils, steep slopes, proximity to cities, and corporate landholdings. The study highlights that a significant portion of this expansion resulted from clearing secondary native forests, contributing to deforestation and biodiversity loss.