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BIOLOGICAL ASSETS - Assumptions (Details) | 12 Months Ended
--- | ---
Dec. 31, 2020 ha R$ / m³ m / ha | Dec. 31, 2019 ha R$ / m³ m / ha
Assumptions used |  |
Planted useful area (hectare) | 1,020,176 | 988,720
Average annual growth (IMA) - m3 /hectare /year | m / ha | 38.43 | 38.34
Average gross sale price of eucalyptus - R$/m3 | R$ / m³ | 70.22 | 66.81
Discount rate - % | 8.90% | 8.40%
Mature assets |  |
Assumptions used |  |
Planted useful area (hectare) | 111,866 | 86,352
Immature assets |  |
Assumptions used |  |
Planted useful area (hectare) | 908,310 | 902,368

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- Definition The discount rate used in the current measurement of fair value less costs of disposal. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2020-01-01 -Paragraph 130 -Subparagraph f -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2020-en-r&anchor=para_130_f_iii&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition Average gross sale price used for calculation of fair value of biological assets. + References No definition available. + Details
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- Details
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- Details
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