a decreasing trendp < 0.05
Conversely, available potassium exhibited a decreasing trend ( Figure 1e ), with a significant reduction in the surface soil ( p < 0.05), while changes in the deeper layer were minor ( p > 0.05).
Conversely, available potassium exhibited a decreasing trend ( Figure 1e ), with a significant reduction in the surface soil ( p < 0.05), while changes in the deeper layer were minor ( p > 0.05).