Table 4.
Minimum, maximum and mean values for the green pixel percentage obtained from the image analysis, as well as the destructively obtained parameters nitrogen uptake (kg ha-1), nitrogen concentration (%), biomass fresh and dry weight (kg ha-1) of wheat at the BBCH stages 19 and 22 in 2014.
| Dates | BBCH | Green pixels (%) | Nitrogen uptake (kg ha-1) | Nitrogen concentration (%) | Biomass dry weight (kg ha-1) | |
|---|---|---|---|---|---|---|
| 29.03.2016 | 19 | Min | 10.9 | 8.1 | 2.6 | 232.8 |
| Max | 29.3 | 17.0 | 3.8 | 573.2 | ||
| Mean | 18.8a | 12.0a | 3.1a | 385.5a | ||
| 04.04.2016 | 22 | Min | 31.9 | 18.1 | 4.4 | 365.2 |
| Max | 60.2 | 41.1 | 5.4 | 826.0 | ||
| Mean | 46.4b | 27.3b | 5.0b | 548.1b | ||
Values with the same letter are not statistically different (P ≥ 0.05) between growth stages for each parameter according to Student’s t-test.