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A cycle of land use between crop and fallow years is needed to work around the infertility of tropical soils.
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A cycle of land use between crop and fallow years is needed to work around the infertility of tropical soils.
A northern coniferous (needle leaf) forest in North America and Eurasia.
A theoretical calculation of the relationship between habitat loss and natural species loss, in which a 90 percent loss of natural forest cover results in a loss of half of the resident species.