Diesel to Solar Irrigation System: Economic, Environmental, and Social Acceptability Analyses by Small-Scale Farmers of Calapan, Oriental Mindoro

Abstract

Solar irrigation systems are sustainable practices that can improve the well-being of local communities and enhance the resilience of agriculture to climate change while reducing environmental impacts. Due to its high investment cost, small-scale farmers are inclined to use traditional fossil-based irrigation systems that can harm humans and the environment. This study aims to analyze the environmental impacts, economic feasibility, and social acceptability of shifting agricultural practices from diesel-fueled to solar irrigation systems. Taking the perspective of small-scale farmers from Calapan City, Oriental Mindoro, results found that solar irrigation system has a higher initial investment but lower maintenance and operational costs. These resulted in an attractive economic feasibility of the project with Php 19,693 of fuel cost savings per hectare per year, a project net present value of Php 10,214 per hectare, a payback period of 8.27 years, and returns on investment at 110%. Additionally, shifting to a solar irrigation system significantly reduces the greenhouse gas emissions from diesel at 199.78 CO2 eq/ha/yr, and avoids air pollutant emissions at 14.91 g/ha/yr particulate matter, 2.98 g/ha/yr nitrogen oxides,193.82 g/ha/yr sulfur oxides, and 149.09 g/ha/yr carbon monoxide. Despite the lack of in-depth environmental awareness, small-scale farmers are interested in investing in solar irrigation systems with 68% social acceptability. Results provide bases for recommendations on promoting more human ecologically and sustainable agriculture irrigation systems in the Philippines and other developing countries.