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The soil moisture monitoring system has further fitted the relationship between soil moisture and soil depth in the wasteland. It shows that the relationship between soil moisture and depth of soil in different precipitation years has strong correlation. The relationship equations are cubic parabola, and the area Most of the hedgehogs have large differences between quadratic parabolas or straight lines. The results showed that there was a significant difference in the variance analysis of soil moisture in different rainfall years, but the results of the comparison of the mean values ​​between different groups were different, and there were significant differences between soil moisture and other years in the special year.
The soil moisture monitoring system analyzed the average soil moisture in the seven-year growing season. The overall comparison between the soil moisture of the abandoned year and the soil moisture of the three forest lands in the area was performed. The lowest significant difference was used to match the mean values ​​of the groups. Comparison. The spatial profile of soil moisture content in different precipitation years is divided into active layer, subactive layer and stable layer from top to bottom. The depth of each layer increases with the increase of precipitation. The relationship between soil moisture content and depth in different rainfall years. Can be expressed by a cubic parabolic equation.
The lower part of the soil moisture is significantly larger than the upper part, which is the biggest difference between the distribution of the soil moisture in the wasteland and the woodland moisture profile. There is a big difference in the soil moisture content between the wasteland soil in the special year and other years. The soil moisture content in the special drought year is not significantly different from other years. It is mainly influenced by soil moisture content in adjacent years. Quantitative analysis methods for numerical application of soil moisture monitoring system can be used for quantitative comparison of soil moisture content between different regions, different vegetation, or different precipitation years.
Soil moisture monitoring system further analyzes the relationship between humidity and depth
For precipitation in the soil is its main source of moisture, which has a great relationship with its water distribution and spatial characteristics. The amount of precipitation in the atmosphere will affect the depth of moisture penetration into the soil. If long-term flooding cannot penetrate below 200cm, then the soil will appear skewed, reaching a maximum at 300cn. Through the soil moisture monitoring system, it was found that as the depth of the soil is gradually deepened, the degree of moisture in the soil does not change much, and basically it is out of stability.