Farming in urban periphery contributes to welfare of urbanites thorough incomes, jobs, and open spaces. Approximately, half of the US's total agricultural sales originate from these areas where urban expansion also creates conflict and competition between farming and urban uses. Since 1980s, Portland, Oregon, has experienced a dramatic urban growth, along with increasing land speculation, fragmentation, and conversion to urban uses. In response, Oregon instituted statewide planning measures to manage its urban growth and to protect its prime farmland from conversion. This book analyzes effects of uncertainty, planning measures, urban uses on Christmas trees and horticultural farming in Portland Metropolitan periphery. A GIS-based-Hedonic Thunian Land Value and a Discrete Choice model show that planning measures may have different impacts for farming dependent on their locations. The study also sheds light on effects of access to local markets, urban land uses, externalities, uncertainty, and expectations on land use value and choice. Hence, this book will be useful to planers, and persons interested in urban management, agricultural economics, policy analysis, and urban studies.