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- W28896939 abstract "Tractors are widely used in the coal fields for land clearing and reclamation. Tractor efficiency is defined as the percentage of tractor hours effectively used. Efficiency is related to many factors, key ones being slope, relief, and soil stoniness, texture, and depth. Using a computerized geographic information system with 3-cells, the authors studied 189 km/sup 2/ (46,674 acres) in Wise Co., Virginia. By combining maps of the major factors, it was possible to assign each land cell to seven efficiency classes including an unsuitable class. The maps are believed useful in area planning, in explaining cost overruns (and profits), and in improving energy conservation within the comprehensive mining system. 5 references, 6 figures, 2 tables." @default.
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- W28896939 date "1985-12-09" @default.
- W28896939 modified "2023-09-23" @default.
- W28896939 title "Tractor efficiency map: applied energetics for a coalfield ownership" @default.
- W28896939 hasPublicationYear "1985" @default.
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