@misc{Kram_Karol_J._Influence_1998,
 author={Kram, Karol J.},
 editor={Polish Academy of Sciences. Institute of Ecology},
 copyright={Creative Commons Attribution BY 3.0 PL license},
 address={Dziekanów Leśny},
 howpublished={online},
 year={1998},
 language={eng},
 abstract={Investigations of leaf area index (LAI) were performed in forest stands of pine, beech as well as birch, alder, spruce, larch and oak using the LAI-2000 Plant Canopy Analyser made by American corporation LI-COR. Canopy LAI has been found to differ considerably depending on both dominant tree species and stand age. From among the species examined spruce exhibited the highest LAI amounting to 10.0 m2 m-2, where other species had much lower LAI-s (within a range 1.6-6.3 m2 m-2). Canopy LAI increased rapidly in young stands attained a peak at approximately age 20 and decreased slowly thereafter. It has been revealed that projected leaf area of an individual tree increases linearly as the tree grows older.},
 title={Influence of species composition and forest age on leaf area index},
 type={Text},
 URL={http://www.rcin.org.pl/Content/98255/PDF/WA058_90624_P2840-T46_Eko-Pol-A-Nr-1.pdf},
 volume={46},
 number={1},
 journal={Polish Journal of Ecology},
 publisher={Polish Academy of Sciences. Institute of Ecology. Publishing Office},
 keywords={leaf area index (LAI), LAI-2000 Plant Canopy Analyzer, pine, beech, forest stand age},
}