Poblaciones de lombrices de tierra en sitios de acumulación de desechos orgánicos en el Valle Central de Costa Rica.
A study was made on the density of earthworms in eight different sites of the Valle Central in Costa Rica, abundant with animal manure, city and coffee bean pulp wastes. Edaphological condition were determined in each site.
Four species were found: Pontoscolex corethrurus, Metaphire californica, Amynthas corticis y Polypheretima elongata.P. corethrurus was the most abundant species found. Soils having abundant cattle manure were the most favorable for this species.
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