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INTRODUCTION by A J Grayson Director of Research
SITE STUDIES SOUTH
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acid alder Alice Holt analysis annosus aphid application Arboricultural areas assessment B.Sc bark beech birch broadleaved trees Broadleaves in Britain Calluna cent clearfelling clones conifers coppice Corsican pine crop damage database deer Dutch elm disease Ecology Edinburgh effect England Conservancy experiments fertiliser Field Surveys ﬂowering foliage Forestry Commission fungus Genetics germination grafts Head of Branch height growth herbicides improved increase infected inﬂuence isolates levels Lodgepole pine M.I.Biol mycorrhizal nitrogen North East England Northern Research Station Norway spruce nursery nutrient pathogenic Pathology Ph.D Picea Pinus contorta plantations planting plots ploughing population production programme Report response rooting sample Scientiﬁc Ofﬁcer Scotland Scotland Conservancy Scots pine seed origins seedlings shelters shoots Silviculture Silviculture North sitchensis Sitka spruce soil South species squirrels staff stem survival temperatures tested timber treatment trials TULEY ulmi upland vegetative propagation Wales weed control Westonbirt Westonbirt Arboretum winter woodland