1. The Year Book of Chinese Agriculture in 2000;Anon,2001
2. Economics of direct seedling in Asia: Patterns of adoption and research priorities;Pandey;IRRN,1999
3. The analysis on grain production development of the valley of the Yangzi River, China;Chen;J Agric Resour & Region Plan,1999
4. No-till farming: The way of the future for a sustainable dryland agriculture;Papendick;Ann Arid Zone,1997
5. Development of no-tillage direct seeding cultivation of rice;Arromratana;JIRCAS Working Rep,2002