Fig. 1. The grid arrangements for the multifractal analysis. (a) is the sampling grids of the soil NO3–N and grain yield for the uniform N treatment (sampling point is indicated by a dot); (b), (c), and (d) are different multifractal cell sizes.
Fig. 1. The grid arrangements for the multifractal analysis. (a) is the sampling grids of the soil NO3–N and grain yield for the uniform N treatment (sampling point is indicated by a dot); (b), (c), and (d) are different multifractal cell sizes.