01411naa a2200253 a 450000100080000000500110000800800410001910000160006024501540007626000090023052005250023965000130076465000260077765000160080365000090081965300260082870000200085470000160087470000140089070000240090470000190092870000130094777301970096016838842019-02-12       2007    bl uuuu     u00u1 u    #d1 aSTEINER, C.  aLong term effects of manure, charcoal and mineral fertilization on crop production and fertility on a highly weathered Central Amazonian upland soil.  c2007  aTherefore, we addressed the following objectives: (i) to quantify the effects of charcoal, organic and inorganic fertilization on soil fertility and crop production; and (ii) to evalute the sustainability of charcoal additions in terms of maintaining high SOM contents and nutrient availability with special emphasis on Terra Firme Ferralsols near Manaus. It is hypothesized that charcoal additions improve nutrient availability and that crop productivity is maintained on a higher level than without charcoal additions.  aAmazonia  aAgricultura Orgânica  aFertilidade  aSolo  aTerra Preta de Índio1 aTEIXEIRA, W. G.1 aLEHMANN, J.1 aNEHLS, T.1 aMACEDO, J. L. V. de1 aBLUM, W. E. H.1 aZECH, W.  tIn: STEINER, C. (Comp.). Slash and char as alternative to slash and burn - soil charcoal amendments maintain soil fertility and establish a carbon sink. Göttingen: Cuvillier, 2007. p. 89-105.