Phosphorus (P) availability and P transformation rates in Amazonian Dark Earth determined by 33P isotopic dilution.
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Amazonian Dark Earth (ADE) often shows increased soil fertility compared to surrounding soils, likely linked to its increased concentration of soil organic matter and macronutrients such as phosphorus (P). For P, there is little knowledge whether the higher P availability is a result of increased biological processes (such as organic P mineralization) or physico-chemical processes (such as sorption/desorption), or both.
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Amazonian Dark Earth, Fósforo, terra preta