Development of radio controlled fertilizer spreader for sloping grasslands

摘要

The radio-controlled fertilizer spreader was developed in order to carry out safety and labor saving operations in sloping grassland where a conventional wheel tractor can not operate safely. The fertilizer distributor of the air blower that can spread in both sides was mounted on the radio-controlled vehicle with rubber crawler. Its travelling performance was enough for 15 degree grassland by running at 0.5 m/s. It could climb on 30 degree grassland at less than 0.5 m/s. When objective coefficient of variation of spreading pattern is 40%, the effective spraying width was 54 m in both sides spreading using compound fertilizer that the specific gravity was 1.61 and the mean particle diameter was 1.48 mm. In the case of the operation in the sloping grassland including the largest slope angle of 27 degrees, the operation capacity of 1.0 hectare per hour was obtained. This operation capacity might be elevated by the improvement on filed division and the method of fertilizer supplies. Fertilizer spreading operation was done using this machine in the total of 24.6 hectare sloping grassland. It could be judged that this machine could be used for a practical use.