With fixed low soil moisture values, the range of backscatter variance depended on LAI and could increase up to 3.2 dB. When LAI is on a fixed level, the variance of backscatter caused by SM gets up to 2.4 dB, (Figure 11). Contribution of LAI to backscatter VH was higher when SM values were low. High difference of σ° VH between two points covered by vegetation does not mean that the soil moisture is really different. In the model (3) σ° VH >−19 dB represents a high value of LAI for SM of about 30%–40%. The same values of σ° VH, i.e., >−19 dB in the model (2) occurred for high SM (>70%) independently of LAI (Figure 9 and Figure 11).