Fig. 8

Inverse detail maps of the different growth stages of nitrogen (N) (b, e), phosphorus (P) (c, f), and potassium (K) (d, g). a Location of zone1, zone2 within the study area. b–g Detailed maps of N, P, and K inversions at different growth stages, 1, 2, and 3 refer to July, September, and November, respectively