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Abera Acholi acres afforestation Africa agriculture annual British Guiana Burma cent climatic Colonial Conference conifers considerable coppice cost cover crop cubic feet cultivation Douglas fir economic effect Empire Forestry Review erosion established estimated eucalypts experience exploitation export factors felling fire forest areas Forest Department forest estate forest officers forest policy Forest Products Forest Service Forestry Commission fuel areas Government grass growth hardwood height important inches increase India industry interest Khaya labour land logs maps ment methods Mvule natural Nigeria Northern Rhodesia Norway spruce nursery obtained operations pine plans plantations planting plots possible present problems protection rainfall regeneration region Scots pine seed seedlings silvicultural softwood soil conservation South species spruce square miles staff stands supply survey teak timber tion trees tropical Uganda United utilization vegetation village volume wood wood fuel woodland