Research Article
Calibration and Algorithm Development for Estimation of Nitrogen in Wheat Crop Using Tractor Mounted N-Sensor
Table 2
Pearson correlation coefficients among different sensor attributes and Lab N at different growing stages of crop.
| Relationship between | Tillering | Booting | Ear emergence | Overall |
| Sensor value and Lab N | 0.85 | 0.63 | 0.64 | 0.68 | <0.001 | <0.001 | <0.001 |
| Sensor biomass and Lab N | 0.87 | 0.610 | 0.57 | 0.58 | <0.001 | 0.0067 | 0.0132 |
| Sensor NDVI and Lab N | 0.90 | 0.49 | 0.41 | 0.34 | <0.001 | 0.0364 | 0.0872 |
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