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Observational analysis reveals cost advantages in logging operations using tractors, indicating improved sustainability.
Modern Diesel-engine powered tractors are helping to revolutionize logging in the redwood region. Once regarded as incapable of handling the large and heavy logs characteristic of the region, tractors are now crowding steam donkey engines to the worst ground and to the winter logging season. Since January 1935, a half million dollars has been spent on forty tractor yarding units and complementary machines for road building. The author computes their all around logging cost advantages to be from $1.35 to $1.70 per M. At the same time, immature trees are saved for future growth and the cut-over land is left in more favorable condition for natural reforestation.
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Emanuel Fritz (1937) studied this question.
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