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机译:规定放牧的有效性取决于时机强度和频率
Fort Keogh Livestock and Range Research Laboratory, 243 Ft. Keogh Rd, Mlles City, MT'69301-4016, USA;
Department of Animal & Range Sciences, PO Box 17290, Bozeman, MT 59717-2900, USA;
Residency; invasive species; Euphorbia esulagrazingOvisgrazing lands;