Nutrient balance of shifting cultivation by burning or mulching in the Eastern Amazon – evidence for subsoil nutrient accumulation

Rolf Sommer(WWF Germany), H. Fölster(University of Göttingen), K. Vielhauer(University of Bonn), Paul L. G. Vlek, T. D. de A. Sá(Brazilian Agricultural Research Corporation), Roberta de Fátima Rodrigues Coelho(Brazilian Agricultural Research Corporation)
Nutrient Cycling in Agroecosystems
March 1, 2004
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