HEIHE, July 7, 2014 - A plane sprays nutrient solution on wheat at the Wudalianchi Farm in Heihe, northeast China's Heilongjiang Province, July 7, 2014.

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HEIHE, July 7, 2014 - A plane sprays nutrient solution on wheat at the Wudalianchi Farm in Heihe, northeast China's Heilongjiang Province, July 7, 2014.

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