Dependence of the dimensions of a plant lifter working tool on morphometric features of the lift plants root systems

The article presents the results of the analysis of published data about the peculiarities of root systems morphometric development of coniferous and deciduous species. Parameters of forest plants with various types of the root system structure are considered including the plants that are cultivated in forest nurseries and those that sprout in natural environment. It is noted that the depth of root penetration into the soil and the degree of their horizontal distribution depend on the age of a plant, its habitat and soil conditions. It is established that the major roots are located in the humus horizon of 10-20 cm thick for the plants of 4-8 years of age when they reveal the largest rehabilitation efficiency. The obtained results are used to determine rational parameters of the tool for a ball-root plantlet excavating: the tool width and the maximum undercutting depth of the plants to ensure minimal damage of root system during excavating thus increasing the quality of the obtained planting material.