  Blockchain is an emerging digital technology allowing ubiquitous financial
transactions among distributed untrusted parties, without the need of
intermediaries such as banks. This article examines the impact of blockchain
technology in agriculture and food supply chain, presents existing ongoing
projects and initiatives, and discusses overall implications, challenges and
potential, with a critical view over the maturity of these projects. Our
findings indicate that blockchain is a promising technology towards a
transparent supply chain of food, with many ongoing initiatives in various food
products and food-related issues, but many barriers and challenges still exist,
which hinder its wider popularity among farmers and systems. These challenges
involve technical aspects, education, policies and regulatory frameworks.
