Skip to main content

Table 6 Correlation coefficient between NO3–N content of petioles and vegetation indices

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

Type of reflectivity Vegetation indices Correlation coefficients
First derivative RD − 0.85**
CIred-edge − 0.89**
NDRE − 0.80**
ND705 − 0.90**
NIR − 0.62**
RI-1 dB − 0.72**
Original RD − 0.81**
CIred-edge − 0.74**
NDRE − 0.77**
ND705 − 0.76**
NIR − 0.79**
RI-1 dB − 0.77**
  1. **Means significant at the level of p < 0.01