Synergistic Evaluation of Environmental Footprints and Water Productivity in Sprinkler vs. Furrow Irrigation of Potato in a Semi-Arid Region

Irrigated potato production is a major agricultural activity in semi-arid regions, where increasing water scarcity and environmental concerns necessitate the adoption of more sustainable production systems. Potato production in semi-arid regions is increasingly constrained by water scarcity and inefficient use of agricultural inputs. This study compared sprinkler irrigation (SI) and furrow irrigation (FI) in potato production in Kuzaran, western Iran, using an integrated assessment of nitrogen footprint (NF), carbon footprint (CF), water productivity, and economic performance. Field-level inventory data were collected from commercial potato farms operating under SI and FI systems in Kermanshah Province, Iran. Carbon and nitrogen footprints were quantified using emission-factor-based approaches incorporating agricultural inputs, direct and indirect nitrogen losses, and N 2 O-derived greenhouse gas emissions. A set of environmental performance indicators, including carbon efficiency ratio, carbon economic efficiency, carbon profitability, nitrogen efficiency ratio, nitrogen economic efficiency, and mitigation potentials, were calculated. In addition, physical and economic water productivity indicators were evaluated under both operational and life-cycle costing frameworks to account for irrigation infrastructure investments and financing scenarios. Sprinkler irrigation substantially outperformed furrow irrigation across most sustainability indicators. Total nitrogen footprint decreased from 4217 to 3335 kg N-eq ha -1 , while yield-scaled nitrogen footprint declined from 0.153 to 0.083 kg N-eq kg -1 yield. Nitrogen efficiency ratio increased by approximately 84%, and nitrogen economic efficiency improved from 1.96 to 3.60 USD kg -1 N-eq. Product carbon footprint decreased from 0.67 to 0.48 kg CO 2 -eq kg -1 yield, accompanied by improvements in carbon efficiency ratio, carbon economic efficiency, and carbon profitability. Sprinkler irrigation also achieved higher potato yield (40 vs. 27.5 t ha -1 ) and superior water productivity, with irrigation water productivity increasing from 2.02 to 4.39 kg m -3 . Even after incorporating infrastructure and financing costs, sprinkler irrigation maintained greater economic water productivity than furrow irrigation. The findings demonstrate that sprinkler irrigation simultaneously reduces environmental footprints, enhances resource-use efficiency, increases water productivity, and improves economic returns. By integrating carbon and nitrogen footprint assessment with life-cycle economic evaluation, this study provides a comprehensive framework for identifying climate-smart and resource-efficient irrigation strategies. The results support wider adoption of sprinkler irrigation as an effective pathway toward sustainable potato production in semi-arid agricultural regions.