Local Heat Potential
The local heat potential combines heat coordinates of slopes/aspects and altitude (Lujić 1960) and is usually used for afforestation of bare lands. The first heat coordinate (E) covers all possible combinations of slope and aspect, grouped in nine heat degrees, according to total annual sum of solar radiation (Tab. 5). The second heat coordinate (V) depends on altitude, with coldest sites on tree line (Tab. 6). As the result, the coldest sites will have values of coordinates of 1,1; and the warmest site will have combination of 9,9. When local heat potential is defined for focal planting site, it is necessary to find sites with the same local heat potential and natural vegetation. It is assumed that the dominant tree species at site with similar value of local heat potential will be well adapted for focal planting site.