Calculation of Foliage Mass and Foliage Area

Introduction In Finland, the forest canopies are the main source of the volatile organic compounds (VOC). These forests are representative of the boreal ones, and they cover about 80% of the total land area of the territory of Finland. The forests throughout the country are utilised commercially and managed regularly with the consequence that the natural tree species composition is much affected by human interference. Similarly, the management affects substantially the stocking as determined by the age distribution of tree populations. This holds also for the foliage density with the consequence that the foliage density is representing large stand-to-stand variability along with the stocking, the dominant tree species, and the age of tree populations.