## 2 Literature Review
\begin{table}
\begin{tabular}{p{113.8 pt} p{113.8 pt} p{113.8 pt}} \hline
**Title** & **Major Contribution** & **Research Question** \\ \hline Privacy Preserved Transparent Supply Chain Management Using Cloud with Secured Smart Contracts [16] & Proposes a privacy-preserving supply chain management framework using cloud services and smart contracts. & How can privacy and transparency be ensured in supply chain management using cloud and blockchain? \\ \hline Design of a Blockchain-based Agricultural Product Traceability and Recommendation System [17] & Presents a blockchain-based traceability and recommendation system for agricultural products. & How can blockchain improve traceability and product recommendations in agriculture? \\ \hline Secure Blockchain-Based Supply Chain Management with Verifiable Digital Twins [18] & Introduces a secure supply chain model integrating blockchain with verifiable digital twins. & How can digital twins enhance blockchain-based supply chain security and verification? \\ \hline Blockchain Technology Enabling Applications in Smart Agriculture [19] & Reviews blockchain applications in smart agriculture for transparency and efficiency. & What are the potential applications of blockchain in smart agriculture? \\ \hline Blockchain-Based Architecture for Improving Maize Supply Chain Performance: Designing an Aggregator Platform [20] & Designs a blockchain-based aggregator platform to improve maize supply chain performance. & How can blockchain-based platforms optimise maize supply chain operations? \\ \hline A Blockchain-Based Credentials for Food Traceability in Agricultural Supply Chain [12] & Proposes a blockchain-based credential system for enhancing food traceability. & How can blockchain credentials improve traceability in agricultural supply chains? \\ \hline Decentralized Parallel Blockchain Agricultural Product Traceability System Security Analysis [21] & Analyses security of a decentralised parallel blockchain system for agricultural traceability. & What are the security implications of decentralised parallel blockchain in agriculture? \\ \hline Blockchain technology in agriculture: Ensuring transparency and traceability in the food supply chain [22] & Reviews blockchain’s role in enhancing transparency and traceability in food supply chains. & How does blockchain contribute to transparency and traceability in food supply chains? \\ \hline Food Chain Management Using Blockchain Technology [23] & Proposes a blockchain framework for efficient food chain management. & How can blockchain streamline food chain management processes? \\ \hline Blockchain-driven Agricultural Product Traceability and Supply Chain Management [24] & Presents a blockchain-based system for agricultural product traceability and supply chain management. & How can blockchain enhance traceability and management in agricultural supply chains? \\ \hline Agricultural Supply Chain Management System Using Blockchain [25] & Designs a blockchain-based system for agricultural supply chain management. & How can blockchain improve efficiency in agricultural supply chain management? \\ \hline Strategies for Detecting Counterfeit Products in the Global Food Supply Chain [26] & Proposes strategies for counterfeit detection using blockchain in food supply chains. & How can blockchain help detect counterfeit products in food supply chains? \\ \hline Blockchain and Internet of Things Technologies for Food Traceability in Olive Oil Supply Chains [27] & Integrates blockchain and IoT for traceability in olive oil supply chains. & How can blockchain and IoT improve traceability in olive oil supply chains? \\ \hline Enhancing transparency and efficiency in blockchain harvest: Empowering farmers and consumers through transparent trading in agricultural applications [28] & Focuses on blockchain’s role in empowering stakeholders through transparent trading. & How can blockchain empower farmers and consumers in agricultural trade? \\ \hline \end{tabular}
\end{table} 
Table 2: Comparative analysis of selected articles and their contributions.