In cutting areas, soil preparation is occasionally necessary before reforestation. The aim of this action is a spatial planning that enables to perform further operations without problems. The removal, collection and ...In cutting areas, soil preparation is occasionally necessary before reforestation. The aim of this action is a spatial planning that enables to perform further operations without problems. The removal, collection and transportation of stumps from the soil are part of this action. Issues related to climate change and the shortcoming of fossil energy sources call attention to increase the rate of renewable energy sources. Using the stumps removed from the soil as fuel is a significant resource within the biomass potential. For lifting a stump together with its roots, a grab mounted on a shovel is generally used. The utilisation of the lifted stumps for energy purposes increased worldwide, especially in the Scandinavian countries. In order to rationalise this operation, analyses of stump lifting time have been carried out. Results of some Hungarian experiments are presented below. The authors tested a machine mounting one grab for stump lifting on three tree types （Scots pine, robinia and poplar） and found functions correlating stump extraction force and stump diameter, which can be used in order to choose the right machine and determine the cost of the operation.展开更多
文摘In cutting areas, soil preparation is occasionally necessary before reforestation. The aim of this action is a spatial planning that enables to perform further operations without problems. The removal, collection and transportation of stumps from the soil are part of this action. Issues related to climate change and the shortcoming of fossil energy sources call attention to increase the rate of renewable energy sources. Using the stumps removed from the soil as fuel is a significant resource within the biomass potential. For lifting a stump together with its roots, a grab mounted on a shovel is generally used. The utilisation of the lifted stumps for energy purposes increased worldwide, especially in the Scandinavian countries. In order to rationalise this operation, analyses of stump lifting time have been carried out. Results of some Hungarian experiments are presented below. The authors tested a machine mounting one grab for stump lifting on three tree types （Scots pine, robinia and poplar） and found functions correlating stump extraction force and stump diameter, which can be used in order to choose the right machine and determine the cost of the operation.
