Research Article
Calibration and Algorithm Development for Estimation of Nitrogen in Wheat Crop Using Tractor Mounted N-Sensor
Table 4
Pearson correlation coefficients among sensor attributes at different growth stages and crop yield.
| Relationship between | Tillering | Booting | Ear emergence |
| Sensor value and yield | 0.94 | 0.85 | 0.85 | <0.001 | <0.001 | <0.001 |
| Sensor biomass and yield | 0.94 | 0.85 | 0.85 | <0.001 | <0.001 | <0.001 |
| Sensor NDVI and yield | 0.92 | 0.87 | 0.72 | <0.001 | <0.001 | 0.0006 |
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