METHOD FOR DETERMINING GROWING STOCK Russian patent published in 2014 - IPC A01G23/00 

FIELD: woodworking industry.

SUBSTANCE: height and diameter of trees are measured at breast height, continuous enumeration of trees by diameter at breast height and height on the sample plot of the stand is carried out. The data obtained are grouped into separate dimensional gradations in diameter at breast height and the stock of stem wood is determined by size gradations in bark and without bark by the formulas $$\begin{array}{l}{V}_{cmi}=\frac{\pi d_{1.3}^2}{4{\left(a_4{\left(\frac{1.3}{H-0.3}\right)}^4+a_3{\left(\frac{1.3}{H-0.3}\right)}^3+a_2{\left(\frac{1.3}{H-0.3}\right)}^2+a_1\left(\frac{1.3}{H-0.3}\right)+a_0\right)}^2}\otimes \\ \otimes N_i{{\displaystyle \underset{0.3}{\overset{H}{\int }}\left(a_4{\left(\frac{l}{H}\right)}^4+a_3{\left(\frac{l}{H}\right)}^3+a_2{\left(\frac{l}{H}\right)}^2+a_1\left(\frac{l}{H}\right)+a_0\right)}}^{2}dl,\end{array}$$ $$V={\displaystyle \sum _{i=1}^n{V}_{cmi}}{N}_i,$$ where V_cmi is the volume of stem wood of trees without bark in each i^th dimension graduation, m³; d_1,3 is the diameter of stem without bark at breast height, m; H is height of stem, m; N_i is the number of trees of one gradation in a uniform stand division in diameter; a₀, a₁, a₂, a₃, a₄ are the coefficients of the generatrix equation of the breed; l is the distance from the butt end of the stem to any section, m; V is the total volume of the stem wood in the division, m³.

EFFECT: increase in accuracy of determining the growing stock and reduction of measurement error.

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