highly significantp < 0.01
Effects of Sowing Methods on Soil Physicochemical Properties During the Regreening Period in Different Ecological Zones According to the results of the three-way ANOVA of soil physicochemical properties at the regreening stage ( Table 2 ), ecological zone (R) had highly significant effects on most soil physicochemical properties ( p < 0.01) and a significant effect on total phosphorus (TP) ( p < 0.05), indicating that ecological zone was an important factor affecting variation in soil physicochemical properties.