ForestHanh

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Doubling wood harvest with tree group planting: 

Doubling wood harvest with tree group planting Rem Khlebopros Andrei Zinovyev

Forest trajectory on NxM plane: 

Forest trajectory on NxM plane Number of trees Total biomass

Von Hahn’s experiments: 

                                          Graphs of growth parameters for group planting (triangles) and for natural pine first-class forest (squares). Von Hahn’s experiments  

“Forest Hahn” Model: 

“Forest Hahn” Model Simple (somewhere naive) Qualitative Deterministic “Geometric”

Individual tree growth: 

Individual tree growth H – tree height; D – tree diameter; HC, C – crown height and diameter respectively. Dt+1 = Dt + keDt/th

Trees competition: 

Trees competition discriminative relation degree of competition

Factor 1. Horizontal crown moving : 

Factor 1. Horizontal crown moving NC(i) - the number of competitors

Factor 2. Vertical crown moving : 

Factor 2. Vertical crown moving free crowded

Factor 3. Depression and mortality : 

Factor 3. Depression and mortality 

Experiments: 

Experiments Variants of tree planting: Poisson (random), equidistant, in groups  

Random planting: 

Random planting

Group planting: 

Group planting

Phase portraits: 

Phase portraits random group

Mortality: 

Mortality

Diameters and masses: 

Diameters and masses

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