Answer: 2023-2028
Notes: The Fourth Agriculture Roadmap of Bihar will be effective from the year 2023 to 2028. This roadmap is proposed to enhance crop productivity, reduce costs, and improve farmers' livelihoods in Bihar through strategic investments in irrigation, technological advances, and infrastructure development. The Agriculture Roadmaps are a set of strategic plans proposed by the Bihar government to promote and strengthen the agricultural sector in the state.
