The hydrometer method: Influence of reading times for determining soil particle size distribution in Havana
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Abstract
used for soil texture analysis in the world. This study is aimed
at evaluating the influence of hydrometer reading times for
determining soil particle size distribution in Havana province.
It is supported by 101 property measurements, starting from
51 sampling points at two depths, 10-15 and 35-40 cm. Point
distribution responds to a more ambitious project focused on
evaluating several physical, chemical and hydraulic properties
from this province, by means of a nonaligned stratified
sampling. Three methodologies, markedly differing in terms of
reading times, were compared to that reported by the Soil
Science Society of America (SSSA). It was proved that by
limiting measuring times to one or two hours, as it is usually
done in several Cuban agronomic laboratories, soil texture
classification may change completely, with a large clay content
overestimation. Calculated sand values were sensitive to the
methodology just for the high contents of this fraction.
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