Area for tree nutrition as a factor of its growth

The parameters of the tree feeding area as a factor influencing the tree dimensions in the 180-year-old pine stand of the 1st class of bonitet with the completeness of 0.94 are studied. The diameter of the trees was determined, numbered and plotted to the plan with an accuracy of ± 10-35 cm. The mutual arrangement of trees in biogroups was determined more accurately (± 3-5 cm]. The Dale map was digitized in the ArcGIS program using 60 shapefiles. Used polygons of power and the average distance from the central tree to 7-12 neighbors. A representative sample of 40 models made it possible to establish that the individual feeding area received by the tree correlates with its diameter at r = 0.29 ± 0.14. Approximation of the trend of the polynomial of this connection shows its strength at the level of 10%. The influence of the tree genotype is about 30% on average. In sum, these two factors affect the size of the tree with a strength of about 40%. As a result, most of the (60%) forces of influence that determine individual tree sizes are unknown. Therefore, in the formed stand, for example, middle age, the increase in individual feeding areas by felling cuttings will have a very weak effect on the size of trees to ripe age. Several times the genotype of the tree will be more affected, the manifestations of which are identifiable by tree-leaders. They should be retained even at the smallest distances between them.