## 4 Conclusions  
At the end of the analysis, the following were the main changes observed in the perception of professionals regarding the development and application of blockchain technology in agribusiness:  
1. Experts believe that blockchain technology has been consolidating the promise of delivering benefits for supply chain management since it improves governance and information flow, facilitates the creation of smart contracts, reduces transaction costs between actors, and increases trust, transparency, and immutability in the sharing of information. 2. Eliminating intermediary agents in transactions and high costs for the implementation and maintenance of blockchain have been the main disadvantages, signaling that the level of competitiveness in the blockchain market still offers opportunities for new entrants. 3. Generating new business models and collecting, processing, and storing data are challenges to be met by overcoming old paradigms, especially concerning information sharing. In addition, other challenges are being overcome, such as establishing standards for technology while eliminating intermediaries, qualifying the information added to the network and the workers' skills, and developing a platform capable of integrating the other blockchain initiatives that seem to be constantly advancing. 4. Finally, integrating blockchain technology with other emerging technologies, especially the IoT, digitalizing supply chains' information, guaranteeing symmetrical access to information, and enabling to trace and certify products are seen as increasing opportunities. Therefore, we conclude that blockchain and its application to agribusiness present the fast development characteristic of any emerging information technology, with several potential uses. In almost three years, the perceptions of professionals working in this field are that most of the benefits of blockchain have grown in importance. In opposition, fewer disadvantages have been identified, with a slight increase in perceived importance. Thus, the benefits of blockchain outweigh the disadvantages in number and importance and are perceived as more relevant. Similar perceptions were observed regarding opportunities and challenges. At least three challenges were perceived as less important in 2022 than in 2020, suggesting the perception that the development of blockchain technology has been able to overcome some bottlenecks perceived as critical not so long ago. On the other hand, all the opportunities considered in the study have increased their perceived importance. We can conclude, therefore, that the perception is that: first, the development of the technology has been overcoming the challenges; and second, the possibilities of blockchain applications in agribusiness have strengthened the belief that they can generate many opportunities. Our conclusions are limited by the number of professionals participating in the study and cannot be generalized. Blockchain is still an emerging technology, and its development and implementation depend on several players and variables. At the current stage of blockchain development and adoption, it is impossible to predict the real impacts that technology may have on agribusiness. Future studies can focus on mapping the fundamental variables for technology development and their effects on supply chains, business, and the possibility of removing actors from supply chains. Finally, major changes can occur in agribusiness due to technologies such as blockchain, and researchers can explore these transformations by proposing appropriate solutions and avoiding adverse developments. The threat of cyber-attacks, for example, was not addressed in this study but deserve attention in future studies.