This paper briefly analyse the genesis, development and change in public sector-led extension approaches in India showing its temporal pattern, emerging innovations in extension approaches and the way forward. It discusses decentralized, community based, pluralistic extension approaches and their opportunities as well as limitations in changing agricultural and natural resources scenario.

Climate change threatens to undermine decades of development achievements in China's Huang-Huai-Hai River Basin. Farmers in the 3H Basin have long been plagued by water scarcity and frequent droughts and floods. Development efforts have succeeded in relieving some of these pressures, but the effects of climate change put these achievements in jeopardy.

Under the guidance of the agricultural system theory, operational research theory and decision-making support system theory, the regional agricultural development decision support system (RADDSS) was developed in this study ,in which different analysis method and models was integrated. By providing data, right models and analysis methods, RADDSS can assist decision-makers and administrators to solve half-structured and unstructured problems, improving level of management on agriculture. The agriculture in Xuchang has been analyzed using the system constructed in this study.