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[J]. Journal of Northern Agriculture, 2010, (3): 118-118.
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[J]. Journal of Northern Agriculture, 2009, (4): 127-127.
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[J]. Journal of Northern Agriculture, 2009, (1): 71-71.
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[J]. Journal of Northern Agriculture, 2008, (S1): 43-43.
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[J]. Journal of Northern Agriculture, 2008, (S1): 36-36.
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[J]. Journal of Northern Agriculture, 2008, (6): 122-122.
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[J]. Journal of Northern Agriculture, 2008, (3): 128-128.
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[J]. Journal of Northern Agriculture, 2007, (S1): 186-186.
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[J]. Journal of Northern Agriculture, 2007, (S1): 194-194.
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[J]. Journal of Northern Agriculture, 2007, (3): 117-117.
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[J]. Journal of Northern Agriculture, 2007, (1): 115-115.
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[J]. Journal of Northern Agriculture, 2007, (1): 119-119.
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