3. Results
3.1. Soil water variations under different land use types
3.1.1. Temporal variations of soil water
The time series of the mean SWC determined for a given soil layer on
a specific date under each of the three land use types are presented in
Fig. 4, while Table 2 presents the correlation coefficients for the SWC between
any two different soil layers under a particular land use type. In
the spring wheat subplot (Fig. 4a), the SWC in the 0–30 cm soil layer
was similar to that in the 30–120 cm soil layer, while overall in the
four layers they tended to increase with increasing soil depth. Signifi-
cant correlations (p b 0.01) were mainly found between two soil layers
that were adjacent (Table 2). In the deepest (200–260 cm) soil layer, the
mean SWC was significantly greater (p b 0.01) than those in the upper
three soil layers (0–30, 30–120, and 120–200 cm), which were not significantly
different from each. In the maize subplot, significant correlations
(p b 0.01) were found between any two soil layers within their
3. Results3.1. Soil water variations under different land use types3.1.1. Temporal variations of soil waterThe time series of the mean SWC determined for a given soil layer ona specific date under each of the three land use types are presented inFig. 4, while Table 2 presents the correlation coefficients for the SWC betweenany two different soil layers under a particular land use type. Inthe spring wheat subplot (Fig. 4a), the SWC in the 0–30 cm soil layerwas similar to that in the 30–120 cm soil layer, while overall in thefour layers they tended to increase with increasing soil depth. Signifi-cant correlations (p b 0.01) were mainly found between two soil layersthat were adjacent (Table 2). In the deepest (200–260 cm) soil layer, themean SWC was significantly greater (p b 0.01) than those in the upperthree soil layers (0–30, 30–120, and 120–200 cm), which were not significantlydifferent from each. In the maize subplot, significant correlations(p b 0.01) were found between any two soil layers within their
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