Table 7.
Coefficient of determination (r2), equation, and P-value for relationship between NDVI, INSEY-DFY, and INSEY-CGDD with sugarcane yield component fit with an exponential relationship at 650 through 750 CGDD.
| Plant index | Cane tonnage | Sugar yield | ||||
|---|---|---|---|---|---|---|
|
| ||||||
| r2 | Equation | p-value † | r2 | Equation | p-value | |
| NDVI | 0.20 | y = 25.2e1.5x | 0.014 | 0.21 | y = 2.9e1.5x | 0.025 |
| INSEY-DFY | 0.23 | y = 39.5e59.2x | <0.001 | 0.33 | y = 3.6e87.3x | <0.001 |
| INSEY-CGDD | 0.46 | y = 18.9e1303x | <0.001 | 0.42 | y = 2.1e1390x | <0.001 |
†
p-values are for overall models.