Rit Mógilsár - Apr 2002, Page 15

Rit Mógilsár - Apr 2002, Page 15
15 6.1 Hæðarvaxtarföll fyrir þrjá gróskuflokka lerkis 4. Mynd/Fig 4. Hæðarvaxtarlínurit/Site-index curves H100 H25 H21 H17 t(1,3) 9 11 15 4. Tafla/Table 4. t(1,3), fjöldi ára sem það tekur viðkomandi gróskuflokk að ná brjósthæðaraldri (1,3m)/Time required for each siteclass to reach the breast height (1,3m), years. Gróskutalan á hæðarvaxtarföllunum H100 sýnir meðalhæðarvöxtin til 100 ára lífaldurs. Hæðarvaxtarföllin sýna H100 = H25, H21, H17. Við 100 ára aldur hafa þessir gróskuflokkar breidd upp á 4 metra. Þeir eru: H21 H25 H17 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 18.0 20.0 22.0 24.0 26.0 28.0 0 10 20 30 40 50 60 70 80 90 100 110 Lífaldur - biological age M eð al hæ ð m - m ea n he ig ht m

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