Survey on Spatial Variability of Surface Soil Moisture and Soil Physical Properties in a Sloping Grassland Field

Spatial variability of surface soil moisture, bulk density, satureted hydraulic conductivity, and penetration resistance (cone index) in a sloping grassland field were surveyed. The typical results were as follows: (1) The surface soil moisture and the bulk density were normally distributed at a significant level of 0.05. (2) The surface soil moistures were higher at low area than in high and slope area. The coefficients of variation were larger at slope area. (3) The coefficients of variation for bulk density were larger at slope area than in low area. (4) The distribution of saturated hydraulic conductivity can be considered to be log-normally distributed. (5) The cone index showed the normal distribution