Maize farmers in the Ethiopian Highlands face significant challenges due to climate variability and change. A systematic review method was employed, including a comprehensive search of academic databases focusing on peer-reviewed articles from to the present. Findings suggest that integrated crop management practices have shown an average yield increase potential of at least 15% under certain climate scenarios. The review highlights promising adaptation strategies but identifies a need for more localized and context-specific interventions. Farmers should be provided with tailored advice based on specific climatic conditions to maximise yield benefits. Model estimation used $\hat{\theta}=argmin_{\theta}\sum_i\ell(y_i,f_\theta(x_i))+\lambda\lVert\theta\rVert_2^2$, with performance evaluated using out-of-sample error.