The aim of the paper was to determine the effect of important meteorological factors on the moisture of light soil under rye and potato at their respective development stages. The analysis was based on daily (24-hour) results of soil moisture measurements under rye and potato and values of meteorological factors for 2001-2003 at the Lipki Agrometeorological Station, located at the vicinity of Stargard Szczeciński. It was observed that weather conditions determined the soil moisture under rye greater than under potato. A possibility of describing the soil moisture with the same meteorological factors also varied depending on the crop development stage. The greatest effect of meteorological factors on daily (24-hour) variability of soil moisture under rye was observed during the flowering – milk stage phenophase, and under potato during the sprouting – flowering phenophase.

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