干旱区生态环境知识资源中心

The majority of apple, pear and sweet cherry production in North America occurs in the temperate deserts of Northern California and the Pacific Northwest states of Washington and Oregon in the United States, and in the adjoining region of Southern British Columbia, Canada. Major north-south mountain ranges cast rain shadows over the central interior portions of these states, ensuring both relatively temperate, dry local weather and plentiful supply of irrigation water from snowmelt fed streams and rivers. Growers have taken advantage of these natural resources by producing over 100 different agricultural commodities, with deciduous tree fruits leading in total value. The climate, experienced growers and support personnel, grower financed research, modern storage and marketing have earned the region a reputation for production of consistent yields of high quality fruit.