In 2006 we have repeated the measurement of trees on a research plots on Pokljuka, which are 1 and 0,8 hectares in size each, of older and younger spruce large timber stand. We have made an evaluation of the development of the forest stand on the basis of data on successive measurements. We have maesured diameters and heights of trees, and made an inventory of their quality signs. The composition of the stands did not changed in the last 50 years, it still remains evenaged and uniform forest structure. Damages on trees are effecting vitality. As expected the defoliation and lenght of crown has an influence on the intensity of the diameter increment. The degrees of defoliation differ according to social status.