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Showing items 1 through 9 of 713.
  1. Library Resource
    Journal Articles & Books
    December, 2001
    Colombia, Central America, South America

    From April to September 1994, macrofauna density, total biomass, and species diversity of earthworms were measured across a range of land use types in the Cabuyal River watershed. The methodology recommended by the Tropical Soil Biology and Fertility (TSBF) Program was used. Macrofauna density, biomass, and diversity of earthworm species varied considerably across land use types, and depths. Initial factor analysis yielded three factors that accounted for 71.8% of the total variance in macrofauna density.

  2. Library Resource
    Journal Articles & Books
    December, 2001
    Colombia, South America

    Para determinar cómo influye la intensidad de la boreo en un Oxisol de la Altillanura sobre las propie dades físicas del suelo relacionadas con el movimiento del agua y relacionar éstas con el almacenamiento y agotamiento de la misma en el suelo a través del balan ce hídrico, se seleccionó un suelo Typic Haplustox isohipertérmico caolinitico de Puerto López (Meta). El suelo venía siendo cultivado con diferente numero de pases de rastra: 2,4 y 8 por año para un total acumula do de 6,12 y 24 pases.

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