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BIOLOGICAL ASSETS (Tables) | 6 Months Ended
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Jun. 30, 2021
BIOLOGICAL ASSETS |
Schedule of changes in balances of biological assets | ​
​ | ​ | ​
Balances on December 31, 2019 |  | 10,571,499
Addition | ​ | 3,392,975
Depletion | ​ | (3,094,742)
Transfers | ​ | (23,471)
Gain on fair value adjustment | ​ | 466,484
Disposal | ​ | (93,847)
Other write-offs | ​ | (57,688)
Balances on December 31, 2020 | ​ | 11,161,210
Addition | ​ | 1,611,674
Depletion | ​ | (1,489,460)
Transfers | ​ | 28,292
Gain on fair value adjustment | ​ | 564,533
Disposal | ​ | (136,044)
Other write-offs | ​ | (19,348)
Balances on June 30, 2021 | ​ | 11,720,857
Schedule of assumptions used in calculation of fair value of biological assets | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31, | ​
​ |  | 2021 |  | 2020 | ​
Planted useful area (hectare) | ​ | 954,008 | ​ | 1,020,176 | ​
Mature assets | ​ | 102,941 | ​ | 111,866 | ​
Immature assets | ​ | 851,067 | ​ | 908,310 | ​
Average annual growth (IMA) - m3/hectare /year | ​ | 38.55 | ​ | 38.43 | ​
Average gross sale price of eucalyptus - R$/m3 | ​ | 72.61 | ​ | 70.22 | ​
Discount rate - % | ​ | 8.9 | % | 8.9 | %
Schedule of fair value adjustment | ​
​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​ | December 31,
​ |  | 2021 |  | 2020
Physical changes | ​ | 268,831 | ​ | 156,906
Price | ​ | 295,702 | ​ | 309,578
​ | ​ | 564,533 | ​ | 466,484

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- Definition The disclosure of the reconciliation of changes in biological assets. [Refer: Biological assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 41 -IssueDate 2020-01-01 -Paragraph 50 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=41&code=ifrs-tx-2020-en-r&anchor=para_50&doctype=Standard -URIDate 2020-01-01 + Details
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