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REPRODUCTIVE PHYSIOLOGY OF THE GREY SQUIRREL by Elizabeth
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Alice Holt analysis aphid appear application areas assessment B.Sc bark bark beetles beech beetles Branch Britain British broadleaved carried caused cent changes collected common compared completed concentrations conifers Conservancy continued cover crop cuttings damage deer Department disease effect England established examined experiments field Forest Forestry Commission four further growing growth Head height herbicide important improved included increase indicated isolates larch levels Lodgepole pine mean measurements methods North Northern nutrient occurred Officer origins Ph.D pine plantations planted plots population produced programme range recorded relation Report Research response root sample Scotland season seed seedlings Service shoots showed significant Silviculture Sitka spruce soil South species staff stands Station stem survey techniques temperature thinning timber treatment trees trials ulmi University Wales weed winter wood