Figure 8.

Calibration of the regression model predicting wheat grain yield (kg ha⁻¹) as a function of crop growth indices, leaf area index (LAI), dry matter accumulation (DMA g m⁻¹), and crop growth rate (CGR g m⁻² d⁻¹) for pooled data of four wheat genotypes at three field capacities and four planting dates recorded at 15 days interval. Data was evaluated for 30, 45, 60, and 75 days after sowing (DAS) and denoted by a, b, c, and d respectively. Y, x, and R² are dependent variable, independent variable and Coefficient of determination respectively.