Long term effects of manure, charcoal and mineral fertilization on crop production and fertility on a highly weathered Central Amazonian upland soil.

摘要

Objectives: (1) quantify the effects of charcoal, organic, and inorganic fertilization on soil fertility and crop production; and (2) to evaluate the sustainability of charcoal additions in terms of maintaning high-SOM contents and nutrient availability with special emphasis on Terra firme Ferrasols near Manaus.