## 3 Results
### Structural and Diversity Parameters of Pine Stands from Degraded Lands
The correlation coefficients (r) obtained from the relationship between crown relative length (\(\text{LC}\)%) x basal diameter (DBH) range between 0.4859 and 0.6597 in the case of the Scots pine species, respectively, and between 0.6578 and 0.9407 in the case of the black pine species for the relationship between crown diameter (Dc) and basal diameter (DBH). Weak correlations were obtained between the following variables: pruned height (hc) x basal diameter (DBH), pruned height (hc) x crown diameter (Dc), and pruned height (hc) x crown relative length (\(\text{Lc}\)%), where the correlation coefficient (r) is situated between 0.1300 and 0.2900. Figure 2: The correlation between DBH and Dc from EP3 Rosoiu Andreiasu: (**a**) Scots pine, RP4; (**b**) European black pine, RP4; (**c**) Scots pine, RP10; (**d**) European black pine, RP9. Figure 4: The correlation between DBH x Dc from EP2 Pălăă–Valea Sárii: (**a**) Scots pine, RP1; (**b**) black pine, RP9. Figure 3: The correlation between DBH and Dc from EP1 Caciu\(-\)Bărsesti: (**a**) Scots pine, RP5; (**b**) European black pine, RP5; (**c**) Scots pine, RP9; (**d**) European black pine, RP9. Figure 5: The correlation between DBH x Dc from EP4 Livada-Rámnicu São\(\check{\text{S}}\)arat: (**a**) Scots pine, RP6; (**b**) black pine, RP9. Figure 6: The correlation between DBH and Lc% from EP3 Rosoiu Andreiasu: (**a**) Scots pine, RP4; (**b**) European black pine, RP4. Figure 7: The correlation between DBH x Le% from EP1 Caciu\(-\)Bârsesit: (**a**) Scots pine, RP5; (**b**) Scots pine, RP9. _In the case of pine stands mixed with broadleaved species (EP2),_ the crown diameters recorded for the black pine species are comparatively higher than the ones obtained for Scots pine, especially for the middle\(-\) and high\(-\) diameter categories. Thus, the mean of the crown diameter registered for Scots pine species is of 3.92 \(\pm\) 0.94 m, and the mean of crown diameter for black pine species is 4.21 \(\pm\) 0.69 m. In general, there were strong correlations between the analyzed variables, with these being direct and positive in all cases as well as strong (Scots pine, RP1: Dc x DBH: r = 0.8401; black pine, RP9: Dc x DBH: r = 0.7500) (Figure 4a,b). The mean of crown relative length (Lc%) (Figure 8a-c) for Scots pine, RP1: (b) black pine, RP9. Figure 8: The correlation between DBH x Lc% from EP2 Páázul Sárat\(-\)Valea Sárii: (**a**) Scots pine, RP1; (**b**) black pine, RP1; (**c**) black pine, RP9. pine species (RP1) is 52.31 \(\pm\) 8.56%, with the amplitude ranging between 37.50 and 66.20%. In the case of black pine species, the mean of crown relative length (Lc%) ranges between 46.42 \(\pm\) 9.23 (RP1) and 50.61 \(\pm\) 7.29% (RP9), with the amplitude ranging between 23.23 (RP1) and 67.31% (RP9). Medium correlations between Dc and DBH were obtained for the both species in EP4 Livada-Ramnicu Sarat (Figure 5a,b). The amplitude of the mean crown diameter (Dc) ranges between 1.41 and 4.18 m in the case of Scots pine stands (RP6), with the mean of 2.47 \(\pm\) 0.66 m, respectively, and between 1.22 and 4.00 m in the case of black pine stands (RP9), with the mean of 2.43 \(\pm\) 0.74. It seems that natural pruning is more active in the case of the pure Scots pine stands (RP6), as the crown relative length (Lc%) has an amplitude ranging between 13.61 and 61.57% compared to pure black pine stands (RP9), where the Lc% ranges between 22.60 and 67.84%.