Supplement 1. Forest inventory
Stand Calculator
Paste your plot measurements; the paper does the arithmetic.
Results per hectare
Paste your measurements on the left, or try "Sample data".
Expansion factor = 10,000 / plot area. Dg: quadratic mean diameter, √(Σd²/n). Lorey height: basal-area weighted mean height, Σgh/Σg. Top height (h₁₀₀): mean height of the 100 thickest trees per hectare. Näslund model h = 1.3 + d²/(a + b·d)², fitted by least squares on its linear form d/√(h − 1.3) = a + b·d. Reineke SDI = N · (Dg/25)^1.605.