Pasture degradation affects forms and distribution of phosphorus in aggregates of tropical soils - Oberson, Astrid; Nesper, Maike; Bünemann, Else K.; Fonte, Steven J.; Rao, Idupulapati M.; Velásquez, Jaime E.; Ramírez, Bertha L.; Hegglin, Django; Frossard, Emmanuel (2014)