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BIOLOGICAL ASSETS (Tables) | 6 Months Ended
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Jun. 30, 2022
BIOLOGICAL ASSETS. |
Schedule of changes in balances of biological assets | ​
​ | ​ | ​
Balances on December 31, 2020 |  | 11,161,210
Addition | ​ | 3,807,608
Depletion | ​ | (3,189,726)
Transfers | ​ | 23,471
Gain on fair value adjustment | ​ | 763,091
Disposal | ​ | (211,433)
Other write-offs | ​ | (105,489)
Balances on December 31, 2021 | ​ | 12,248,732
Addition | ​ | 2,135,997
Depletion | ​ | (1,821,352)
Gain on fair value adjustment | ​ | 171,618
Disposal | ​ | (54,494)
Other write-offs | ​ | (16,455)
Balances on June 30, 2022 | ​ | 12,664,046
Schedule of assumptions used in calculation of fair value of biological assets | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31, | ​
​ |  | 2022 |  | 2021 | ​
Planted useful area (hectare) | ​ | 994,314 | ​ | 1,060,806 | ​
Mature assets | ​ | 133,631 | ​ | 138,739 | ​
Immature assets | ​ | 860,683 | ​ | 922,067 | ​
Average annual growth (IMA) - m3/hectare /year | ​ | 36.08 | ​ | 37.58 | ​
Average gross sale price of eucalyptus - R$/m3 | ​ | 79.24 | ​ | 76.38 | ​
Discount rate - % | ​ | 9.2% | ​ | 8.9% | ​
Schedule of fair value adjustment | ​
​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31,
​ |  | 2022 |  | 2021
Physical changes | ​ | (710,268) | ​ | 148,190
Price | ​ | 881,886 | ​ | 614,901
​ | ​ | 171,618 | ​ | 763,091

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