Smallholder farms in Nigeria face challenges related to productivity and sustainability. A randomized field trial was conducted across three regions of Nigeria. Energy consumption data were collected using a mixed-methods approach combining quantitative measurements with qualitative interviews to assess system performance and identify best practices. Energy consumption decreased by 15% in randomly selected farms implementing new energy-efficient technologies, indicating significant potential for productivity improvements. The study highlights the effectiveness of randomized field trials in measuring clinical outcomes within smallholder farming systems. This method provides actionable insights for policy makers and practitioners aiming to enhance agricultural efficiency. Policymakers should invest in research that validates and scales up these energy-efficient technologies, while farmers can adopt them as part of their sustainable production strategies. The empirical specification follows $Y=\beta_0+\beta^\top X+\varepsilon$, and inference is reported with uncertainty-aware statistical criteria.