National Forest Inventory Volume II

Some of the major assumptions of the National Forest Inventory Volume II: State of Forest Carbon Report are:

  1. The NFI design has 2,424 Cluster Plot (CP) laid at 4 km x 4 km grid across the country, from which 20 % of the plot are randomly selected as “Carbon plot” for the collection of understorey shrub, herb, litter and soil samples.
  2. Only 1,969 CP were accessible for data collection and accordingly, understorey data collection could only be done for 354 CP.
  3. Forest is defined as any land area with trees spanning more than 0.5 ha with trees higher than 5 m height and canopy cover of more than 10%. Forests is not restricted to the State Reserved Forest Land and includes all types of land meeting the minimum threshold of the Forest definition irrespective of their ownership, land use and legal status except land under permanent agriculture or horticulture crops.
  4. Biomass and carbon for five carbon pools; (i) AGB, (ii) BGB; (iii) CWD; (iv) Litter and (v) SOC is estimated. The sixth carbon pool, harvested wood product (HWP) is not considered as it is beyond the scope of the NFI.
  5. Below-ground biomass (BGB) is estimated using the root to shoot ratio.
  6. Biomass is converted into carbon using Carbon Fraction (CF) of 0.47
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