Improvement methods in forest site diagnosis techniques

On 127 experimental plots were classified into different forest site types according to vegetational criteria, 16 main soil properties were analysed and their content in a 100 x 100 x 150 cm soil lump was calculated. The expert system and the linear discriminant analysis showed different soil properties and their groups enabling stronger or weaker division of the examined sites into forest site types. The content of 0.1-0.02 mm fraction, the content of <0.02 mm fraction, the concentration of H+ ions as pH reaction in H2O and the content of mobile N were pointed to as those which better distinguish coniferous forest (13) from mixed coniferous forest (BM), mixed coniferous forest from mixed broadleaved forest (LM) and mixed broadleaved forest from broadleaved forest (L). The other soil properties in the expert system showed a weaker strength in differentiating the examined sites into different forest site types according to vegetational criteria.