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Silviculture of Poplars
Diseases and Pests
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acid appear beech beech roots beechwoods Britain brown forest soils Bulky calcareous Calluna canker canopy cellulose chalk climate colour complex considerable contorta pine Corsican pine crop decomposition deep depth descending roots Douglas fir drains European larch experiments factors flocculent Forestry Commission formation frost furrow gelatin girth growing heath height growth hoppus feet horizon humus hybrids inches Inchnacardoch Japanese larch Kielder lateral roots layer leached leaf extracts lignin limestone litter extract loam Lodgepole pine Lon Mor method mixture Molinia mull and mor mull soils nitrogen Norway spruce occur organic matter peat phosphate Photo Pinus contorta plantations plots ploughing podzol poplar precipitate protein rainfall reaction region regression rendzina rm rm root system sand Scirpus Scots pine seedlings shallow shelter shoots Sitka spruce slopes species stand subsoil surface temperature thinning tion trial turf planting vegetation volume table wood