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International audienceThe objective of this study was to explore spatio-temporal variabilitycharacteristic of soil volumetric moisture content (SVMC) during wheatand maize rotation system. In the article, SVMC was determined by theTime Domain Reflectometry (TDR), a total of 104 soil moisture contentdata from sampling sites were collected from the surface layer(0–20cm) at the experiment field (117°3’55.74"E,36°43’8.99"N) with the support of grid-sampling method,sample measurements were implemented on June 3rd and on September 24th,2009. On each sampling point, we inserted vertically TDR probe tomonitor soil moisture. Each moisture measurement was geo-referencedusing a Differential Global Positioning System (DGPS). The statisticalanalysis results showed that the SVMC range from 2.65 to 4.65 coveredapproximately percent 67% of the total samplings on June 3rd, whichindicated the important effects on the total statistical distribution.Approximately percent 76% of the total samplings range from 45.4 to 55.4on September 24th. To analyze the temporal variability of SVMC, wedeveloped the comparison analysis results also indicated that thespatial pattern of SVMC clarified the fundamental complicated factors ofthe spatial structures and the comprehensive factors, and the exogenousvariable decreased the effects on the spatial variability of SVMC frompercent 70.9% to 54.9%, the random factors dominated the spatialvariability of SVMC. The spatial distribution map of SVMC by Kriginginterpolation was better to help us precisely and well understand thespatial distribution pattern of the SVMC of wheat-maize rotation systemon the field scale

Spatio-temporal Variability Analysis of Soil Volumetric Moisture Content on the Field Scale