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    0607 Plant Biology (2)
    070308 Crop and Pasture Protection (Pests, Diseases and Weeds) (2)
    biology (1)
    Californian thistle (1)
    Cirsium arvense (1)
    dormancy (1)
    germination (1)
    growth regulator (1)
    Oxalis (1)
    plant growth (1)