01813naa a2200253 a 450000100080000000500110000800800410001910000170006024500620007726000090013950001080014852010270025665000200128365000170130365300140132065300170133465300170135170000210136870000170138970000250140670000220143170000180145377300880147110914022019-06-18       1999    bl uuuu     u00u1 u    #d1 aPAVAN, M. A.  aHigh coffee population to improve fertility of an oxisol.  c1999  aTítulo em português: Densidade populacional de cafeeiros para melhorar a fertilidade de um Latossolo.  aThe objective of this work was to evaluate the effect of coffee (Coffea arabica L.) population densities on the chemical and microbiological properties of an Oxisol. The work was carried out on soil samples of 0-20 cm depth originated from an experimental site which had been used for coffee tree spacing studies during 15 years, in Parana State, Brazil. Eight coffee tree populations were evaluated: 7143, 3571, 2381, 1786, 1429, 1190, 1020, and 893 trees/ha. Increasing plant population increased soil pH, exchangeable Ca, Mg, K, extractable P, organic carbon, moisture content and coffee root colonization by vesicular arbuscular mycorrhizal fungi, and decreased exchangeable A1 and microbial biomass. Such results were attributed to better erosion control, improved plant residue management and nutrient cycling, and decreased leaching losses. Increasing coffee tree population per unit of area has shown to be an important reclamation recuperation strategy for improving fertility of the acid soils in Parana, Brazil.  aCoffea Arábica  aEspaçamento  aAcid soil  aSolos acidos  aTree spacing1 aCHAVES, J. C. D.1 aSIQUEIRA, R.1 aANDROCIOLI FILHO, A.1 aCOLOZZI FILHO, A.1 aBALOTA, E. L.  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 34, n. 3, p. 459-65, mar. 1999