Pasture degradation decreases organic P content of tropical soils due to soil structural decline - Nesper, Maike; Bünemann, Else K.; Fonte, Steven J.; Rao, Idupulapati M.; Velásquez, Jaime E.; Ramírez, Bertha L.; Hegglin, Django; Frossard, Emmanuel; Oberson, Astrid (Elsevier, 2015)