Temporal and Spatial Distribution and Fractal Characteristic of Surface Soil Water of Orchard in Yantai

In the bloom growth stage of fruit trees surface soil water of orchard was sampled with Trime soil water system and then,data statistic,variogram,and fractal characteristic were analyzed.The results showed that ranges and sills were maximal,and the coefficients of variations and fractal dimensions were minimal after rainfall.Under P_1 of 90% or 95% and same precision,the reasonable sampling numbers was minimal after rainfall,and at the same time the change extent of spatial isoline distribution of soil water was also relatively small.The findings showed that rainfall resulted in more even distribution of soil water,and more significant spatial correlation.