It was found that the biomass of 75-year-old pine stands was 184.0 t·ha^-1, ranging from 168.5 t·ha^-1 to 203.0 t·ha^-1. Generally, the total stand biomass increased with improvement of site conditions. The tree layer was its major component making 155.5 t·ha^-1 on the average, i.e. 84.5%. The mean biomass of the bark was 21.5 t·ha^-1 (11.7%) and the needles 5.6 t·ha^-1 (3.0%), while that of the undergrowth and shrub layer 1.4 t·ha^-1 (0.8%). The wood of the tree layer generally did not make more than 66% of the biomass production understood as the amount of dry matter produced in a year. It ranged from 3.591 t·ha^-1 to 4.259 t·ha^-1. The biomass of the annual foliage, ranging from 2.020 t·ha^-1 to 2.344 t·ha^-1 made from 32.1% to 39.3% of the biomass increment, while the increment of the undergrowth and shrubs did not have any significant effect on annual production of pine stands.

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