Popis: |
The Indian black earth (IBE) is found in patches of soil throughout the Amazon basin, whose origin is related to the deposition of waste materials from pre-Columbian populations. These soils are riches in nutrients, especially P, Ca and Mg, because of this widely used by small farmers. In this paper gives a review of the origin of the ICC, its physical and chemical properties describing important aspects that lead to the theory of cultural customs of the ancient peoples of Central Amazonia. |