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This paper explores how the energy-efficient integration of IoT-based sensing and blockchains, an innovation in the field of Digital Infrastructure technologies, can be used to incentivize virtuous behaviors in agricultural practices. The novelty of the study lies specifically in the unprecedented use of constrained sensing devices as trustworthy data sources for a permissionless blockchain. Furthermore, we show how our research results, advancing the State-of-the-Art in the IoT and blockchain interactions, can support the interests of a diverse set of water management stakeholders in a concrete use-case implementation. To assess our contribution and validate our results we use a system architecture comprising constrained IoT devices for measuring water consumption used as direct data-source actors, a public blockchain infrastructure, and smart contracts that represent the interests of different water management …