Abstract
Brazil nut tree (Bertholletia excelsa Humb. & Bonpl., 1808 ), from Amazon rainforest, is important economically in the production of Brazil nuts, an seed with protein and energy value. There are two types of Brazil nut trees: 1- Native tree: Type "wild", coming from Amazon forest; 2- Cultivated and organic tree: Culture produced by grafting of selected genotypes by Embrapa and organic…