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Table 9 Validation between predicted and measured of NO3–N content in petioles based on different methods

From: Estimation of nitrate nitrogen content in cotton petioles under drip irrigation based on wavelet neural network approach using spectral indices

Methods Blue edge parameters Vegetation indices
Number of samples R2 RSME (g/L) MAE (g/L) Number of samples R2 RSME (g/L) MAE (g/L)
WNN 60 0.88 0.65 0.47 60 0.82 0.87 0.68
RF 60 0.82 0.79 0.60 60 0.82 0.92 0.76
RBF 60 0.81 0.80 0.61 60 0.82 0.88 0.72
BP 60 0.77 0.89 0.65 60 0.74 1.02 0.81