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美国位于北纬25°~48°,面积982.6675万km2。美国果树年产值180亿美元。在2000年,果树收入占农作物收入的13%,占整个农业收入的6%。柑橘、葡萄、苹果和香蕉是最受欢迎的水果;扁桃、核桃、薄壳山核桃是消费者最喜欢的干果。在美国除柑橘类外,在果品产量中核桃产量排名第五,仅次于葡萄、扁桃、苹果和草莓。美国99%核桃位于加利福尼亚州中部宽64~100km、长720km的中央谷。中央谷的北部属于地中
The United States is located at latitudes 25 ° ~ 48 ° north with an area of 98.266750 million km2. The annual output value of the U.S. fruit trees is 18 billion U.S. dollars. In 2000, fruit trees accounted for 13% of the crop’s income and 6% of the total agricultural income. Citrus, grapes, apples and bananas are the most popular fruits; almonds, walnuts, and walnuts are the consumer favorite dried fruit. In addition to citrus in the United States, the yield of walnut in the production of fruit ranked fifth, second only to grapes, almonds, apples and strawberries. The United States 99% walnuts located in central California, 64 ~ 100km wide, 720km long central valley. The northern part of the Central Valley belongs to the ground