Determination of traction resistance of forest planting machine and quality of seedling planting under field conditions

The establishment of artificial plantations of tree and shrub species is done by sowing and planting. The most reliable and widespread method, due to better growth and development of seedlings and less need for maintenance, is planting. Forest planting is currently being done on large areas. This paper presents the results of a field study to determine the traction resistance of a forest planting machine and the quality of planting of seedlings depending on the distance between the rollers 130-165 mm for two different rollers, 400×100 mm and 310×35 mm. The strain gauge method was used in the experiment. The strain gauge equipment consisted of a multi-channel strain gauge station with a built-in generator to power the sensor. The ZET 058 strain gauge station allowed data collection from an S-shaped strain gauge that was mounted on the strain gauge linkage. Tensometric equipment allowed to determine that the resistance of the forest planting machine when installing 400×100 mm packer rollers is 1.3 times greater than when using 310×35 mm rollers. Moreover, when increasing the distance between the rollers from 130 to 165 mm, the resistance of the forest planting machine with 400×100 mm rollers decreases by 24.7%, and with 310×35 mm rollers decreases by 34%. The 400×100 mm rollers showed the best results on light soils. The average angle of inclination of seedlings during planting is 7.5°, the depth of root neck embedding is 2-3 cm, and the pulling force is 1.8-2.3 kg. All indicators lie within the optimal value. The obtained experimental data will contribute to the creation of new types of forest planting machine designs, which will further improve the quality of planting seedlings and increase the survival rate of planting material. 

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