Quantifying Correlation Analysis
The relationships between drought indices and crop yields were analyzed using Spearman’s rho correlation coefficient. This non-parametric method was chosen to account for potential non-linear relationships. Statistical significance was determined at p<0.05p < 0.05p<0.05. Limitations of satellite-based indices, such as uncertainties in NDVI and SPEI compared to ground-based measurements, were considered in interpreting results.