Smallholder farming systems in Ghana face challenges related to resource management and productivity. A series of randomized field trials were conducted across diverse landscapes within Ghana. These trials aimed at measuring the impact of different agricultural practices and inputs on farm productivity and sustainability. The analysis revealed significant increases in crop yields by up to 20% when integrated soil management techniques were applied, with a confidence interval of ±5%. This represents a notable proportion of efficiency gains attributable to randomized field trial interventions. Randomized field trials provided robust evidence supporting the effectiveness of certain agricultural practices for enhancing smallholder farm productivity in Ghana. These findings can guide policy and resource allocation towards more efficient farming systems. Further research should focus on scaling up these intervention strategies to larger plots of land, with a particular emphasis on community-based participatory approaches to ensure sustainability and farmer adoption. The empirical specification follows $Y=\beta_0+\beta^\top X+\varepsilon$, and inference is reported with uncertainty-aware statistical criteria.