In Northern Iraq, growing Populus nigra L. occurs in small areas and narrow plains among the mountains. The samples selected for temporal plotting assessed these strains’ current and future growth. Thirty-five samples underwent random selection to cover an area of 0.1 ha. Measuring the DBH (diameter at mean height) and mean height of each sample comprised cutting two trees from the dominant and subdominant trees and taking the cross-sections at DBH. Statistical analysis established a nonlinear mathematical relationship between diameter growth and mean height diameter. Creating a tree table estimates the growth by listing diameter classes and frequencies for all samples. Populus volume per hectare’s determination used the local Populus nigra volume database. Therefore, utilizing the stand table projection method helps determine the migration of tree diameter classes within the stand over the next two years. The prediction of the final stand volume and number of trees was also easy. Since these stands had intensive management, an assumption was the number of dead and felled trees was zero, with the number of mature trees implicitly measured by calculating the movement of the trees for the next two years. The difference between current and future volumes’ evaluation revealed accurate growth.
Populus nigra L., stand table, growth and yield, non-linear equations, present and future volume
The tree table’s development used diameter classes and frequencies for all samples aided in growth estimates. The stand table projection determined tree diameter migration inside the stand during the next two years. The dead and felled trees were considerably zero, and an implicit estimation of mature trees relied on tree movement.