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Alice Holt aphid application Arboricultural assessed B.Sc beech BRASIER Britain British broadleaved clear felled clones Commission Research Information conifer conservation Corsican pine damage deer density diameter disease DOE Arboricultural Advisory Douglas fir Dutch elm disease effect establishment experiments Ferris-Kaan fertiliser ﬂowering forest condition Forest Officer Forestry Commission Research fungus gley soils habitats Head of Branch Headley hedgerows herbicides inﬂuence investigated Kielder lodgepole pine ment MOFFAT monitoring moth Northern Research Station Norway spruce nursery Pathology peat Ph.D Picea Plant Production Plate poplar population programme Research Information Note restock roe deer root sample plots Scientific Officer Scotland Scots pine seed seedlings shoot sika deer Silviculture North Sitka spruce sludge soil Statistics and Computing storage survey Thetford Forest timber tion treatment tree growth Tree Improvement trials upland vegetation Wales weed control Wildlife windthrow woodland yield