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BIOLOGICAL ASSETS (Tables) | 12 Months Ended
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Dec. 31, 2022
BIOLOGICAL ASSETS. |
Schedule of changes in balances of biological assets | ​
​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | December 31,
​ | ​ | 2022 | ​ | 2021
Opening balance | ​ | 12,248,732 | ​ | 11,161,210
Additions | ​ | 4,957,380 | ​ | 3,807,608
Depletions | ​ | (3,665,057) | ​ | (3,189,726)
Transfers | ​ | ​ | ​ | 23,471
Gain on fair value adjustments | ​ | 1,199,759 | ​ | 763,091
Disposals | ​ | (82,331) | ​ | (211,433)
Other write-offs | ​ | (26,297) | ​ | (105,489)
Closing balance | ​ | 14,632,186 | ​ | 12,248,732
​
Schedule of assumptions used in calculation of fair value of biological assets | The table below discloses the measurement of the premises adopted: ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | December 31, | ​
​ |  | 2022 | ​ | 2021 | ​
Planted useful area (hectare) | ​ | 1,097,081 | ​ | 1,060,806 | ​
Mature assets | ​ | 134,752 | ​ | 138,739 | ​
Immature assets | ​ | 962,329 | ​ | 922,067 | ​
Average annual growth (IMA) – m3/hectare/year | ​ | 37.07 | ​ | 37.58 | ​
Average gross sale price of eucalyptus – R$/m3 | ​ | 90.16 | ​ | 76.38 | ​
Discount rate - % (post-tax) | ​ | 9.1 | % | 8.9 | %
​
Schedule of fair value adjustment | The fair value adjustment justified by the combined variations of the indicators mentioned above resulted in a positive variation of R$1,199,759 recognized in other operating income (expenses), net (Note 30). ​
​ | ​ | ​ | ​ | ​
​ | ​ | December 31, |  | December 31,
​ |  | 2022 |  | 2021
Physical changes | ​ | (37,088) | ​ | 148,190
Price | ​ | 1,236,847 | ​ | 614,901
​ | ​ | 1,199,759 | ​ | 763,091
​

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