01149nam a2200205 a 450000100080000000500110000800800410001910000190006024501230007926001930020252004260039565000160082165000160083765300130085365300110086665300110087770000190088870000190090770000170092616731982014-10-16       2002    bl uuuu     u00u1 u    #d1 aPREISINGER, H.  aSpatial and temporal change of the spontaneous vegetation in an agricultural fields experiment.h[electronic resource]  aIn: GERMAN-BRAZILIAN WORKSHOP ON NEOTROPICAL ECOSYSTEMS. ACHIEVEMENTS AND PROSPECTS OF COOPERATIVE RESEARCH, 2000, Hamburg. Proceedings... Hamburg: SHIFT: MADAM: WAVES, 2002. p. 183.c2002  aThe objective of the SHIFT field trial carried out on an area of 17 ha at the experimental site of EMBRAPA Amazônia Ocidental near Manaus, Amazonas, Brazil, is to try out the reuse of an abandoned agricultural site by mixed cropping systems and to survey some of the most important ecological interactions between the growth of the useful plants, the spontaneous vegetation in the field, and management and site factors.  aAgricultura  aVegetação  aAmazonas  aBrasil  aManaus1 aCOÊLHO, L. F.1 aGASPAROTTO, L.1 aLIEBEREI, R.