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BIOLOGICAL ASSETS - Fair value adjustment (Details) - BRL (R$)
R$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Fair value adjustment of biological assets recognized under other operating income (expense), net      
Physical changes R$ (347,409)    
Price 532,808    
Fair value adjustment of biological assets recognized under other operating income (expense), net 185,399 R$ (129,187) R$ 192,504
Biological assets pledged R$ 0