On the other hand, strawberry growers in central California do not benefit from earlier harvest market-wise, but plastic mulch is widely used for another purpose, specifically fruit quality.

相反，加利福尼亚中部的草莓种植者并没有获益于提早收获的市场优势，但塑料薄膜覆盖广泛用于其它目的，特别用于提高果品品质。

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California grows most of the strawberry crop in the United States.

VOA: special.2009.05.19

Consider the strawberry farmer in Oxnard, California, who told CNN that not once in 25 years of planting and harvesting had an American citizen ever asked for a job picking strawberries.

CNN: Commentary: U.S. workers will pick that lettuce -- for $1,000 a week