Preliminary Pollen Calendar of Posadas City (Argentine) by Paul, R. M., Fernández, L. C., Huk, L. H.

“…The monitoring has been performed fortnightly using a Tauber type gravitational trap in a sampling site corresponding to the central area in Posadas City, at six metres over the ground. Nineteen pollen types representing the surrounding vegetation (pavements, parks, squares, garden, unused lands) have been identified. …”
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