<![CDATA[Durian cultivation is a horticultural sector with high economic potential; however, its development in the lowland areas of Grobogan Regency faces several challenges, particularly limited water availability, specific soil characteristics, and the need for more efficient land management. This study aimed to design a smart farming system for lowland durian cultivation based on sustainable agriculture through field condition evaluation and a literature review of Internet of Things (IoT) technology, automatic irrigation systems, and solar energy utilization. The research was conducted at a pilot-project durian plantation in Ngaringan District, Grobogan Regency. The research methods included field observation, analysis of soil chemical characteristics using soil test kits and SoilGrids data, land mapping based on GPS coordinates, and a literature review related to smart farming development. The results showed that the study area had suitable soil pH, organic carbon content, and cation exchange capacity for durian cultivation, although potassium levels were relatively low. Based on these findings, a smart farming system was designed by integrating solar panels, an energy management system, pH sensors, soil moisture sensors, nutrient sensors, an IoT-based microcontroller, a cloud server, and an automatic drip irrigation system. The proposed system design has the potential to improve water and energy use efficiency while supporting sustainable durian cultivation]]>
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