Abstract
Agriculture in the Pacific Northwest (PNW) of the United States is diverse. The states within this region, Washington, Idaho and Oregon, are ranked as the 11th, 20th and 21st respectively, in the U.S. for crop value, including nursery and ornamentals in 2012 (USDA NASS 2014). Combined, over 17 million ha of land were farmed within this region of the U.S. in 2015 (USDA NASS 2016a, b, c). The ability to produce a diversity of commodities is due to the range of eco-climates in the region. The PNW spans three ecoregions as defined by Omernik (1987) and outlined by the Commission for Environmental Cooperation (1997). Eco-regions are defined as areas where the type, quality and quantity of environmental resources are generally similar. The region closest to the Pacific Ocean in the PNW is defined as the Marine West Coast Forest. This region has precipitation evenly dispersed throughout the year and has a narrow temperature range with cool summers (temperatures below 22 °C) and mild winters (temperatures above 0 °C). The inland forested mountainous region found in the PNW is characterized by a transition from a moist, maritime climate in the west to a drier, continental climate in the east. The eastern part of the PNW, encompassing the middle portions of Washington and Oregon and southern portion Idaho is part of the North American Desert region. This arid region is characterized by an annual precipitation of approximately 230 mm.
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Zasada, I.A., Dandurand, LM., Gleason, C., Hagerty, C.H., Ingham, R.E. (2018). Plant Parasitic Nematodes of the Pacific Northwest: Idaho, Oregon and Washington. In: Subbotin, S., Chitambar, J. (eds) Plant Parasitic Nematodes in Sustainable Agriculture of North America. Sustainability in Plant and Crop Protection. Springer, Cham. https://doi.org/10.1007/978-3-319-99585-4_8
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