Study finds Oregon’s planning program protects farm and forest land – incrementally, and over time
September 22nd, 2010A new study finds Oregon’s landmark land use planning program has been successful in protecting farm and forest land – but perhaps not as successful as thought, and perhaps for different reasons than previously thought.
The review focuses on published research evaluating the forest and farm land conservation effects of Oregon’s land use planning program. The authors explain that land use planning in Oregon seeks to influence rates and patterns of land use change and development through zoning and permitting processes. Its effects are largely incremental and occur over long periods of time, and are therefore difficult to measure. It is particularly difficult to distinguish the effects of the planning program from the many other confounding factors that also influence land use change and development such as socioeconomic effects, urbanization pressure, the spatial location of land relative to existing cities, and topography. Controlling for these other variables is necessary to accurately gauge the effectiveness of the planning program.
One study cited by the authors suggests Oregon’s land use planning program prevented 13% of the developable supply of land from being developed between 1982 and 1997. A bit surprisingly, the study found that the most effective land use policies – incentive-based policies, such as tax deferrals – have reduced the supply of developable land in Oregon by 8%. This means the planning program itself is responsible for only 5% of the land saved from development. Still, a lot of land has been saved from development – about 2,442,000 acres, according to estimates. If Oregon’s regulatory system is responsible for saving 939,000 acres of farm and forest land from development, that’s a pretty remarkable achievement.
The authors point out that the planning program wasn’t designed to stop development. Rather, it is a growth management program: it restricts the rates, locations, and densities at which development can take place and facilitates the orderly and efficient development of rural lands while protecting forest and farm lands and conserving them for farm and forest uses. But merely protecting farm and forest lands does not guarantee the continuation of commercial farming and forestry on those lands. In the authors’ minds, whether land use planning is resulting in sustained or improved farming and forestry viability remains an unanswered question.
The study’s co-authors include Hannah Gosnell, Garrett Chrostek, and James Duncan from OSU and Jeffry Kline from the USDA Forest Service’s Pacific Northwest Research Station. The study, titled Is Oregon’s land use planning program conserving forest and farm land? A review of the evidence, is published in the January 2011 issue of Land Use Policy. The study is available through a free sample issue online.




